The latest officially reported population of Afghanistan was 43,844,111 in 2025 vs 240,254 people in Sao Tome and Principe in 2025. In 2026, based on the adjusted UN estimation, the current Afghanistan's population is 45,682,388 people compared to 247,495 in Sao Tome and Principe.
Population statistics:
- Afghanistan's population is 184.6 times bigger than Sao Tome and Principe's.
- Afghanistan is ranked the 36th most populous country in the world, while Sao Tome and Principe is the 176th.
- The countries together account for 0.55% of the world: 0.55% for Afghanistan vs 0.003% for Sao Tome and Principe.
- For the last 10 years, Afghanistan has had an average growth rate of +2.68% per year vs +1.83% in Sao Tome and Principe.
- Since 2006, the population of Afghanistan has increased from 25.4M people to 45.7M (79.7% growth), while Sao Tome and Principe has grown from 166K to 247K (49.4% growth).
Afghanistan vs Sao Tome and Principe: population by year and forecast
| Year | Population | |
|---|---|---|
Afghanistan
|
Sao Tome
|
|
| 2100 | 131,724,468 | 538,656 |
| 2099 | 131,066,750 | 537,257 |
| 2098 | 130,403,871 | 535,715 |
| 2097 | 129,730,117 | 534,052 |
| 2096 | 129,070,342 | 532,281 |
| 2095 | 128,396,829 | 530,505 |
| 2094 | 127,685,065 | 528,585 |
| 2093 | 126,942,174 | 526,572 |
| 2092 | 126,194,378 | 524,436 |
| 2091 | 125,433,421 | 522,255 |
| 2090 | 124,561,248 | 519,929 |
| 2089 | 123,768,926 | 517,542 |
| 2088 | 122,960,614 | 515,028 |
| 2087 | 122,074,409 | 512,499 |
| 2086 | 121,308,199 | 509,949 |
| 2085 | 120,413,992 | 507,271 |
| 2084 | 119,420,025 | 504,516 |
| 2083 | 118,560,008 | 501,611 |
| 2082 | 117,671,742 | 498,655 |
| 2081 | 116,771,980 | 495,622 |
| 2080 | 115,724,307 | 492,416 |
| 2079 | 114,561,305 | 489,178 |
| 2078 | 113,556,727 | 485,864 |
| 2077 | 112,455,804 | 482,385 |
| 2076 | 111,375,301 | 478,877 |
| 2075 | 110,333,033 | 475,315 |
| 2074 | 109,170,742 | 471,700 |
| 2073 | 107,895,475 | 468,051 |
| 2072 | 106,682,883 | 464,286 |
| 2071 | 105,504,989 | 460,447 |
| 2070 | 104,167,895 | 456,490 |
| 2069 | 102,902,233 | 452,388 |
| 2068 | 101,568,136 | 448,306 |
| 2067 | 100,320,548 | 444,092 |
| 2066 | 99,057,144 | 439,773 |
| 2065 | 97,655,437 | 435,502 |
| 2064 | 96,248,770 | 431,068 |
| 2063 | 94,892,092 | 426,645 |
| 2062 | 93,522,871 | 422,127 |
| 2061 | 92,260,642 | 417,629 |
| 2060 | 90,945,998 | 413,061 |
| 2059 | 89,663,478 | 408,522 |
| 2058 | 88,293,680 | 403,970 |
| 2057 | 86,865,803 | 399,359 |
| 2056 | 85,428,888 | 394,790 |
| 2055 | 84,023,782 | 390,100 |
| 2054 | 82,626,785 | 385,416 |
| 2053 | 81,236,203 | 380,685 |
| 2052 | 79,860,096 | 375,964 |
| 2051 | 78,595,977 | 371,143 |
| 2050 | 77,285,393 | 366,347 |
| 2049 | 75,819,307 | 361,542 |
| 2048 | 74,435,057 | 356,694 |
| 2047 | 73,075,297 | 351,813 |
| 2046 | 71,654,160 | 346,841 |
| 2045 | 70,310,871 | 341,791 |
| 2044 | 68,983,509 | 336,747 |
| 2043 | 67,616,795 | 331,669 |
| 2042 | 66,317,516 | 326,608 |
| 2041 | 64,937,760 | 321,551 |
| 2040 | 63,497,378 | 316,415 |
| 2039 | 62,092,429 | 311,237 |
| 2038 | 60,767,134 | 306,029 |
| 2037 | 59,418,629 | 300,834 |
| 2036 | 58,079,976 | 295,584 |
| 2035 | 56,769,901 | 290,361 |
| 2034 | 55,469,080 | 285,145 |
| 2033 | 54,103,368 | 279,952 |
| 2032 | 52,759,572 | 274,798 |
| 2031 | 51,403,105 | 269,704 |
| 2030 | 50,049,673 | 264,687 |
| 2029 | 48,739,663 | 259,670 |
| 2028 | 47,504,926 | 254,717 |
| 2027 | 46,283,055 | 249,827 |
| 2026 | 45,047,977 | 245,033 |
| 2025 | 43,844,111 | 240,254 |
| 2024 | 42,647,492 | 235,536 |
| 2023 | 41,454,761 | 230,871 |
| 2022 | 40,578,842 | 226,305 |
| 2021 | 40,000,412 | 221,961 |
| 2020 | 39,068,979 | 217,435 |
| 2019 | 37,856,121 | 213,392 |
| 2018 | 36,743,039 | 210,187 |
| 2017 | 35,688,935 | 206,970 |
| 2016 | 34,700,612 | 203,689 |
| 2015 | 33,831,764 | 200,291 |
| 2014 | 32,792,523 | 196,767 |
| 2013 | 31,622,704 | 193,148 |
| 2012 | 30,560,034 | 189,439 |
| 2011 | 29,347,708 | 185,649 |
| 2010 | 28,284,089 | 181,802 |
| 2009 | 27,466,101 | 177,853 |
| 2008 | 26,482,622 | 173,793 |
| 2007 | 25,909,852 | 169,700 |
| 2006 | 25,424,094 | 165,638 |
| 2005 | 24,404,567 | 161,639 |
| 2004 | 23,560,654 | 157,705 |
| 2003 | 22,733,049 | 153,814 |
| 2002 | 21,378,117 | 149,922 |
| 2001 | 20,284,307 | 146,375 |
| 2000 | 20,130,327 | 144,018 |
| 1999 | 19,887,785 | 142,442 |
| 1998 | 19,159,996 | 140,751 |
| 1997 | 18,452,091 | 138,922 |
| 1996 | 17,763,266 | 136,962 |
| 1995 | 17,065,836 | 134,895 |
| 1994 | 16,250,794 | 132,732 |
| 1993 | 14,943,172 | 130,467 |
| 1992 | 13,278,974 | 128,110 |
| 1991 | 12,238,879 | 125,697 |
| 1990 | 12,045,660 | 122,980 |
| 1989 | 11,874,088 | 119,979 |
| 1988 | 11,523,298 | 116,939 |
| 1987 | 11,387,818 | 113,919 |
| 1986 | 11,420,074 | 111,150 |
| 1985 | 11,426,852 | 108,658 |
| 1984 | 11,190,221 | 106,394 |
| 1983 | 10,917,982 | 104,380 |
| 1982 | 10,991,378 | 102,508 |
| 1981 | 11,937,581 | 100,615 |
| 1980 | 13,169,311 | 98,544 |
| 1979 | 13,655,567 | 96,252 |
| 1978 | 13,611,441 | 93,794 |
| 1977 | 13,340,756 | 91,301 |
| 1976 | 13,059,851 | 88,922 |
| 1975 | 12,773,954 | 86,708 |
| 1974 | 12,469,127 | 84,672 |
| 1973 | 12,157,999 | 82,798 |
| 1972 | 11,853,696 | 81,041 |
| 1971 | 11,567,667 | 79,330 |
| 1970 | 11,290,128 | 77,626 |
| 1969 | 11,017,409 | 76,083 |
| 1968 | 10,756,922 | 74,765 |
| 1967 | 10,505,959 | 73,596 |
| 1966 | 10,266,395 | 72,576 |
| 1965 | 10,036,008 | 71,680 |
| 1964 | 9,814,318 | 70,865 |
| 1963 | 9,604,487 | 70,112 |
| 1962 | 9,404,406 | 69,403 |
| 1961 | 9,214,083 | 68,707 |
| 1960 | 9,035,043 | 68,012 |
Data sources: United Nations | World Population Prospects (2026–2100, retrieved 2026-07-08); World Bank | Health (1960–2025, retrieved 2026-07-08).
GeoRank.org/population/afghanistan/sao-tome-and-principe | CC BY 
From 2006 to 2016, the population of Afghanistan increased by 9,276,518 people (a 36.5% growth), while Sao Tome and Principe gained 38,051 people (a 23% growth).
For the next 10 years, from 2016 to 2026, Afghanistan gained 10,981,776 people (a 31.6% growth), while Sao Tome and Principe's population increased by 43,806 people (a 21.5% growth).
Afghanistan was ranked 45th most populous country in 2006 and is 36th in 2026. Sao Tome and Principe was ranked 178th in 2006 and ranked 176th now.
The UN's World Population Prospects forecasts that in 24 years (in 2050) Afghanistan's population will grow by 69.2% to 77,285,393 people with a rank change from 36th to 25th. The population of Sao Tome and Principe will increase by 48% to 366,347 people and rank change from 176th to 175th.
Afghanistan is projected to reach its peak in 2100 at 132M people compared to the peak of 539K people in 2100 for Sao Tome and Principe.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
Afghanistan
|
Sao Tome
|
|
| 2100 | 0.5% | 0.26% |
| 2099 | 0.51% | 0.29% |
| 2098 | 0.52% | 0.31% |
| 2097 | 0.51% | 0.33% |
| 2096 | 0.52% | 0.33% |
| 2095 | 0.56% | 0.36% |
| 2094 | 0.59% | 0.38% |
| 2093 | 0.59% | 0.41% |
| 2092 | 0.61% | 0.42% |
| 2091 | 0.7% | 0.45% |
| 2090 | 0.64% | 0.46% |
| 2089 | 0.66% | 0.49% |
| 2088 | 0.73% | 0.49% |
| 2087 | 0.63% | 0.5% |
| 2086 | 0.74% | 0.53% |
| 2085 | 0.83% | 0.55% |
| 2084 | 0.73% | 0.58% |
| 2083 | 0.75% | 0.59% |
| 2082 | 0.77% | 0.61% |
| 2081 | 0.91% | 0.65% |
| 2080 | 1.02% | 0.66% |
| 2079 | 0.88% | 0.68% |
| 2078 | 0.98% | 0.72% |
| 2077 | 0.97% | 0.73% |
| 2076 | 0.94% | 0.75% |
| 2075 | 1.06% | 0.77% |
| 2074 | 1.18% | 0.78% |
| 2073 | 1.14% | 0.81% |
| 2072 | 1.12% | 0.83% |
| 2071 | 1.28% | 0.87% |
| 2070 | 1.23% | 0.91% |
| 2069 | 1.31% | 0.91% |
| 2068 | 1.24% | 0.95% |
| 2067 | 1.28% | 0.98% |
| 2066 | 1.44% | 0.98% |
| 2065 | 1.46% | 1.03% |
| 2064 | 1.43% | 1.04% |
| 2063 | 1.46% | 1.07% |
| 2062 | 1.37% | 1.08% |
| 2061 | 1.45% | 1.11% |
| 2060 | 1.43% | 1.11% |
| 2059 | 1.55% | 1.13% |
| 2058 | 1.64% | 1.15% |
| 2057 | 1.68% | 1.16% |
| 2056 | 1.67% | 1.2% |
| 2055 | 1.69% | 1.22% |
| 2054 | 1.71% | 1.24% |
| 2053 | 1.72% | 1.26% |
| 2052 | 1.61% | 1.3% |
| 2051 | 1.7% | 1.31% |
| 2050 | 1.93% | 1.33% |
| 2049 | 1.86% | 1.36% |
| 2048 | 1.86% | 1.39% |
| 2047 | 1.98% | 1.43% |
| 2046 | 1.91% | 1.48% |
| 2045 | 1.92% | 1.5% |
| 2044 | 2.02% | 1.53% |
| 2043 | 1.96% | 1.55% |
| 2042 | 2.12% | 1.57% |
| 2041 | 2.27% | 1.62% |
| 2040 | 2.26% | 1.66% |
| 2039 | 2.18% | 1.7% |
| 2038 | 2.27% | 1.73% |
| 2037 | 2.3% | 1.78% |
| 2036 | 2.31% | 1.8% |
| 2035 | 2.35% | 1.83% |
| 2034 | 2.52% | 1.85% |
| 2033 | 2.55% | 1.88% |
| 2032 | 2.64% | 1.89% |
| 2031 | 2.7% | 1.9% |
| 2030 | 2.69% | 1.93% |
| 2029 | 2.6% | 1.94% |
| 2028 | 2.64% | 1.96% |
| 2027 | 2.74% | 1.96% |
| 2026 | 2.75% | 1.99% |
| 2025 | 2.81% | 2% |
| 2024 | 2.88% | 2.02% |
| 2023 | 2.16% | 2.02% |
| 2022 | 1.45% | 1.96% |
| 2021 | 2.38% | 2.08% |
| 2020 | 3.2% | 1.89% |
| 2019 | 3.03% | 1.52% |
| 2018 | 2.95% | 1.55% |
| 2017 | 2.85% | 1.61% |
| 2016 | 2.57% | 1.7% |
| 2015 | 3.17% | 1.79% |
| 2014 | 3.7% | 1.87% |
| 2013 | 3.48% | 1.96% |
| 2012 | 4.13% | 2.04% |
| 2011 | 3.76% | 2.12% |
| 2010 | 2.98% | 2.22% |
| 2009 | 3.71% | 2.34% |
| 2008 | 2.21% | 2.41% |
| 2007 | 1.91% | 2.45% |
| 2006 | 4.18% | 2.47% |
| 2005 | 3.58% | 2.49% |
| 2004 | 3.64% | 2.53% |
| 2003 | 6.34% | 2.6% |
| 2002 | 5.39% | 2.42% |
| 2001 | 0.76% | 1.64% |
| 2000 | 1.22% | 1.11% |
| 1999 | 3.8% | 1.2% |
| 1998 | 3.84% | 1.32% |
| 1997 | 3.88% | 1.43% |
| 1996 | 4.09% | 1.53% |
| 1995 | 5.02% | 1.63% |
| 1994 | 8.75% | 1.74% |
| 1993 | 12.5% | 1.84% |
| 1992 | 8.5% | 1.92% |
| 1991 | 1.6% | 2.21% |
| 1990 | 1.44% | 2.5% |
| 1989 | 3.04% | 2.6% |
| 1988 | 1.19% | 2.65% |
| 1987 | -0.28% | 2.49% |
| 1986 | -0.06% | 2.29% |
| 1985 | 2.11% | 2.13% |
| 1984 | 2.49% | 1.93% |
| 1983 | -0.67% | 1.83% |
| 1982 | -7.93% | 1.88% |
| 1981 | -9.35% | 2.1% |
| 1980 | -3.56% | 2.38% |
| 1979 | 0.32% | 2.62% |
| 1978 | 2.03% | 2.73% |
| 1977 | 2.15% | 2.68% |
| 1976 | 2.24% | 2.55% |
| 1975 | 2.44% | 2.4% |
| 1974 | 2.56% | 2.26% |
| 1973 | 2.57% | 2.17% |
| 1972 | 2.47% | 2.16% |
| 1971 | 2.46% | 2.2% |
| 1970 | 2.48% | 2.03% |
| 1969 | 2.42% | 1.76% |
| 1968 | 2.39% | 1.59% |
| 1967 | 2.33% | 1.41% |
| 1966 | 2.3% | 1.25% |
| 1965 | 2.26% | 1.15% |
| 1964 | 2.18% | 1.07% |
| 1963 | 2.13% | 1.02% |
| 1962 | 2.07% | 1.01% |
| 1961 | 1.98% | 1.02% |
Data sources: United Nations | World Population Prospects (2026–2100, retrieved 2026-07-08); World Bank | Health (1961–2025, retrieved 2026-07-08).
GeoRank.org/population/afghanistan/sao-tome-and-principe | CC BY
In 2025, the population of Afghanistan grew by 2.81%, while Sao Tome and Principe's population grew by 2%.
Live population counters
|
Afghanistan
|
Sao Tome
|
|
|---|---|---|
| Current population |
45682388
|
247495
|
| Population rank | 36/197 | 176/197 |
| Percent of world population | 0.55% | 0.003% |
| One net population change |
26.4 seconds
|
1.86 hours
|
| One birth every |
21.1 seconds
|
1.32 hours
|
| One death every |
2.16 minutes
|
6.73 hours
|
| Daily growth/decline | +3,278 | +13 |
| Annual growth/decline | +1,196,619 | +4,718 |
| Annual growth/decline rate | +2.81% | +2% |
| Population growth rate rank | 20/197 | 50/197 |
| One migration net change every |
7.08 minutes
|
13.5 hours
|
| Annual migration change | -74,404 | -650 |
| Net migration rank | 179/196 | 90/196 |
| Foreign-born residents | 98,110 | 1,955 |
| Foreign-born residents rank | 131/195 | 194/195 |
| Foreign-born share of population | 0.2% | 0.8% |
| Foreign-born share rank | 186/195 | 162/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
Afghanistan
|
Sao Tome
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | -74,404 | - | -650 |
| 2024 | 1,249,785 | -44,089 | 5,315 | -604 |
| 2023 | 1,228,719 | -48,958 | 5,221 | -592 |
| 2022 | 1,219,475 | -647,402 | 5,102 | -592 |
| 2021 | 1,133,611 | -548,784 | 4,954 | -782 |
| 2020 | 1,134,407 | 143,634 | 4,874 | 0 |
| 2019 | 1,138,485 | 9,159 | 4,932 | -1,716 |
| 2018 | 1,115,262 | -36,753 | 4,957 | -1,757 |
| 2017 | 1,101,218 | -71,491 | 5,007 | -1,779 |
| 2016 | 1,090,016 | -143,049 | 5,125 | -1,793 |
| 2015 | 1,077,068 | -286,314 | 5,269 | -1,809 |
| 2014 | 1,053,788 | 233,913 | 5,381 | -1,801 |
| 2013 | 1,033,778 | 18,119 | 5,449 | -1,787 |
| 2012 | 1,004,814 | 68,628 | 5,501 | -1,739 |
| 2011 | 966,743 | 384,486 | 5,445 | -1,616 |
| 2010 | 943,473 | -167,460 | 5,391 | -1,529 |
| 2009 | 920,581 | -60,602 | 5,349 | -1,328 |
| 2008 | 891,246 | 215,753 | 5,297 | -1,203 |
| 2007 | 889,848 | -851,298 | 5,226 | -1,127 |
| 2006 | 875,301 | 57,673 | 5,057 | -1,031 |
| 2005 | 855,112 | 250,971 | 4,897 | -941 |
| 2004 | 850,940 | -269,194 | 4,810 | -894 |
| 2003 | 826,165 | 247,317 | 4,702 | -816 |
| 2002 | 776,048 | 860,349 | 4,591 | -690 |
| 2001 | 764,090 | -212,872 | 4,471 | -1,289 |
| 2000 | 782,727 | -1,025,973 | 4,334 | -2,798 |
| 1999 | 760,727 | -32,400 | 4,221 | -2,594 |
| 1998 | 719,860 | 7,380 | 4,120 | -2,364 |
| 1997 | 709,778 | -21,215 | 4,041 | -2,153 |
| 1996 | 685,005 | 4,072 | 3,993 | -1,974 |
| 1995 | 653,280 | 52,505 | 3,948 | -1,829 |
| 1994 | 609,096 | 315,206 | 3,860 | -1,644 |
| 1993 | 541,257 | 1,149,684 | 3,841 | -1,527 |
| 1992 | 440,132 | 1,197,329 | 3,822 | -1,432 |
| 1991 | 409,954 | 32,782 | 3,801 | -1,362 |
| 1990 | 402,433 | -458,737 | 3,719 | -727 |
| 1989 | 381,158 | 18,296 | 3,576 | -571 |
| 1988 | 358,397 | -56,263 | 3,544 | -465 |
| 1987 | 314,361 | -345,535 | 3,440 | -470 |
| 1986 | 310,066 | -343,397 | 3,180 | -614 |
| 1985 | 228,469 | -208,685 | 3,242 | -828 |
| 1984 | 205,262 | 248,224 | 3,163 | -1,041 |
| 1983 | 263,778 | -172,797 | 3,100 | -1,203 |
| 1982 | 263,210 | -500,998 | 3,047 | -1,203 |
| 1981 | 343,468 | -1,998,086 | 3,015 | -1,067 |
| 1980 | 365,396 | -1,174,239 | 2,965 | -770 |
| 1979 | 361,750 | -525,413 | 2,893 | -491 |
| 1978 | 369,101 | -117,186 | 2,800 | -279 |
| 1977 | 372,567 | -83,115 | 2,705 | -255 |
| 1976 | 357,775 | -85,430 | 2,608 | -302 |
| 1975 | 343,850 | -44,418 | 2,515 | -392 |
| 1974 | 330,232 | -20,009 | 2,422 | -474 |
| 1973 | 315,062 | -3,030 | 2,329 | -525 |
| 1972 | 300,633 | -4,050 | 2,232 | -517 |
| 1971 | 288,267 | -12,801 | 2,127 | -430 |
| 1970 | 275,129 | 4,458 | 1,980 | -279 |
| 1969 | 263,823 | 2,029 | 1,862 | -469 |
| 1968 | 251,798 | 3,333 | 1,767 | -520 |
| 1967 | 239,967 | 6,824 | 1,693 | -606 |
| 1966 | 228,786 | 3,563 | 1,642 | -688 |
| 1965 | 217,741 | 10,695 | 1,611 | -765 |
| 1964 | 207,867 | 7,079 | 1,600 | -819 |
| 1963 | 198,035 | 6,681 | 1,609 | -886 |
| 1962 | 188,427 | 7,016 | 1,625 | -927 |
| 1961 | 179,094 | 6,109 | 1,657 | -960 |
| 1960 | 170,257 | 2,606 | 1,547 | -860 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08).
GeoRank.org/population/afghanistan/sao-tome-and-principe | CC BY
Over the last 10 years, 87.3% of the population change in Afghanistan is from natural causes (a gain of 11,488,046 people) and 12.7% is from migration (a loss of 1,674,047 people). In Sao Tome and Principe 81.6% is from natural causes (a gain of 50,756 people) and 18.4% is from migration (a loss of 11,424 people).
As of 2024, 98,110 residents or 0.2% of the population were not native-born in Afghanistan, compared to 1,955 people or 0.8% in Sao Tome and Principe.
Biggest cities by population
|
Afghanistan
|
|
|---|---|
| City | Population |
| Kabul | 5.33M |
| Kandahar | 614K |
| Herat | 556K |
| Mazar-i-Sharif | 469K |
| Kunduz | 357K |
| Jalalabad | 263K |
| Lashkargah | 202K |
| Sheberghan | 176K |
| Khost | 160K |
| Ghazni | 143K |
|
Sao Tome
|
|
|---|---|
| City | Population |
| Sao Tome | 65.5K |
| Trindade | 6.64K |
Compare countries by 7 more topics
Population differences between Afghanistan and Sao Tome and Principe
|
Afghanistan
|
Sao Tome
|
|
|---|---|---|
| Life expectancy | 66.8 years | 70.3 years |
| Average age | 22.2 years | 25.2 years |
| Median age | 18.3 years | 20.5 years |
| Male:Female ratio | 50.5:49.5 | 49.7:50.3 |
| Fertility rate | 4.76 births per woman | 3.6 births per woman |
| Population density | 178.9 ppl/mi² | 661 ppl/mi² |
Population map with other countries
Data sources: World Bank | Health (1960–2025, retrieved 2026-07-08); United Nations | World Population Prospects (1960–2026, retrieved 2026-07-08); U.S. Census Bureau (1960–2025, retrieved 2026-07-08); Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08).
GeoRank.org/population/afghanistan/sao-tome-and-principe | CC BY
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Data sources:
- World Bank | Health (1960–2025, retrieved 2026-07-08)
- United Nations | World Population Prospects (1960–2100, retrieved 2026-07-08)
- U.S. Census Bureau (1960–2025, retrieved 2026-07-08)
- Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-07-08)
- Wikidata (2026, retrieved 2026-07-08)
Creative Commons Attribution (CC BY) — you’re free to copy, share, remix, adapt, and use even commercially as long as you give appropriate credit and clearly indicate if you made changes. Other sources may be subject to different license terms.