The latest officially reported population of the DR Congo was 109,276,265 in 2024 vs 14,754,785 people in Guinea in 2024. In 2026, based on the adjusted UN estimation, the current DR Congo's population is 117,507,801 people compared to 15,546,235 in Guinea.
Population statistics:
- The DR Congo's population is 7.56 times bigger than Guinea's.
- The DR Congo is ranked the 15th most populous country in the world, while Guinea is the 75th.
- The countries together account for 1.61% of the world: 1.42% for the DR Congo vs 0.19% for Guinea.
- For the last 10 years, the DR Congo has had an average growth rate of +3.38% per year vs +2.54% in Guinea.
- Since 2006, the population of the DR Congo has increased from 60.6M people to 118M (93.9% growth), while Guinea has grown from 9.44M to 15.5M (64.7% growth).
DR Congo vs Guinea: population by year and forecast
| Year | Population | |
|---|---|---|
|
|
|
|
| 2100 | 436,320,913 | 32,376,229 |
| 2099 | 433,372,904 | 32,347,865 |
| 2098 | 430,335,169 | 32,314,004 |
| 2097 | 427,231,271 | 32,276,347 |
| 2096 | 424,043,303 | 32,235,495 |
| 2095 | 420,759,430 | 32,192,977 |
| 2094 | 417,384,609 | 32,140,512 |
| 2093 | 413,946,692 | 32,082,262 |
| 2092 | 410,440,733 | 32,016,043 |
| 2091 | 406,841,757 | 31,950,972 |
| 2090 | 403,166,901 | 31,877,383 |
| 2089 | 399,411,004 | 31,796,200 |
| 2088 | 395,583,655 | 31,706,914 |
| 2087 | 391,688,383 | 31,616,297 |
| 2086 | 387,713,874 | 31,513,784 |
| 2085 | 383,678,330 | 31,397,618 |
| 2084 | 379,568,054 | 31,278,121 |
| 2083 | 375,402,379 | 31,149,657 |
| 2082 | 371,195,818 | 31,018,417 |
| 2081 | 366,948,626 | 30,874,294 |
| 2080 | 362,644,227 | 30,732,838 |
| 2079 | 358,295,825 | 30,578,815 |
| 2078 | 353,888,897 | 30,422,788 |
| 2077 | 349,435,210 | 30,262,797 |
| 2076 | 344,932,895 | 30,093,594 |
| 2075 | 340,403,800 | 29,912,683 |
| 2074 | 335,826,108 | 29,730,771 |
| 2073 | 331,220,816 | 29,543,355 |
| 2072 | 326,568,298 | 29,350,201 |
| 2071 | 321,892,514 | 29,147,256 |
| 2070 | 317,165,418 | 28,940,409 |
| 2069 | 312,409,702 | 28,724,140 |
| 2068 | 307,625,941 | 28,502,451 |
| 2067 | 302,820,577 | 28,273,692 |
| 2066 | 297,989,401 | 28,038,741 |
| 2065 | 293,137,514 | 27,799,894 |
| 2064 | 288,267,282 | 27,554,829 |
| 2063 | 283,369,365 | 27,300,055 |
| 2062 | 278,452,605 | 27,040,837 |
| 2061 | 273,517,380 | 26,777,235 |
| 2060 | 268,572,331 | 26,512,111 |
| 2059 | 263,620,905 | 26,236,871 |
| 2058 | 258,672,397 | 25,952,601 |
| 2057 | 253,733,756 | 25,667,399 |
| 2056 | 248,796,045 | 25,375,302 |
| 2055 | 243,861,631 | 25,076,744 |
| 2054 | 238,931,249 | 24,776,691 |
| 2053 | 234,016,357 | 24,464,996 |
| 2052 | 229,117,369 | 24,154,455 |
| 2051 | 224,240,788 | 23,840,942 |
| 2050 | 219,397,034 | 23,524,366 |
| 2049 | 214,588,560 | 23,209,588 |
| 2048 | 209,814,694 | 22,891,820 |
| 2047 | 205,079,870 | 22,568,175 |
| 2046 | 200,379,842 | 22,241,327 |
| 2045 | 195,731,078 | 21,911,584 |
| 2044 | 191,124,003 | 21,583,213 |
| 2043 | 186,569,843 | 21,246,672 |
| 2042 | 182,068,630 | 20,909,610 |
| 2041 | 177,617,360 | 20,571,500 |
| 2040 | 173,224,822 | 20,229,061 |
| 2039 | 168,878,834 | 19,889,710 |
| 2038 | 164,583,465 | 19,552,134 |
| 2037 | 160,347,349 | 19,214,553 |
| 2036 | 156,129,049 | 18,874,400 |
| 2035 | 151,953,443 | 18,536,891 |
| 2034 | 147,811,138 | 18,203,307 |
| 2033 | 143,712,496 | 17,864,588 |
| 2032 | 139,669,159 | 17,522,696 |
| 2031 | 135,660,570 | 17,180,034 |
| 2030 | 131,710,378 | 16,833,632 |
| 2029 | 127,818,130 | 16,491,163 |
| 2028 | 123,980,695 | 16,145,186 |
| 2027 | 120,212,011 | 15,798,054 |
| 2026 | 116,505,117 | 15,452,864 |
| 2025 | 112,854,120 | 15,105,390 |
| 2024 | 109,276,265 | 14,754,785 |
| 2023 | 105,789,731 | 14,405,468 |
| 2022 | 102,396,968 | 14,055,137 |
| 2021 | 99,148,932 | 13,710,513 |
| 2020 | 95,989,998 | 13,371,183 |
| 2019 | 92,947,442 | 13,034,346 |
| 2018 | 90,047,644 | 12,704,774 |
| 2017 | 87,083,398 | 12,385,659 |
| 2016 | 83,956,415 | 12,073,030 |
| 2015 | 81,035,531 | 11,767,070 |
| 2014 | 78,403,242 | 11,472,924 |
| 2013 | 75,789,395 | 11,191,873 |
| 2012 | 73,254,618 | 10,921,581 |
| 2011 | 70,849,311 | 10,656,810 |
| 2010 | 68,563,038 | 10,396,086 |
| 2009 | 66,412,044 | 10,143,534 |
| 2008 | 64,390,664 | 9,898,870 |
| 2007 | 62,477,752 | 9,662,281 |
| 2006 | 60,615,908 | 9,441,171 |
| 2005 | 58,775,724 | 9,245,844 |
| 2004 | 56,997,741 | 9,062,726 |
| 2003 | 55,343,867 | 8,870,781 |
| 2002 | 53,750,524 | 8,674,066 |
| 2001 | 52,132,646 | 8,539,960 |
| 2000 | 50,507,442 | 8,428,832 |
| 1999 | 48,912,971 | 8,265,123 |
| 1998 | 47,297,600 | 8,081,990 |
| 1997 | 46,029,902 | 7,931,370 |
| 1996 | 45,296,124 | 7,770,035 |
| 1995 | 44,433,704 | 7,553,249 |
| 1994 | 42,626,876 | 7,345,107 |
| 1993 | 40,656,336 | 7,128,177 |
| 1992 | 39,228,910 | 6,914,366 |
| 1991 | 37,925,817 | 6,697,166 |
| 1990 | 36,684,063 | 6,434,374 |
| 1989 | 35,486,866 | 6,215,811 |
| 1988 | 34,382,752 | 6,056,574 |
| 1987 | 33,298,904 | 5,900,198 |
| 1986 | 32,265,196 | 5,750,668 |
| 1985 | 31,264,816 | 5,610,373 |
| 1984 | 30,245,081 | 5,480,096 |
| 1983 | 29,250,963 | 5,359,814 |
| 1982 | 28,338,190 | 5,247,672 |
| 1981 | 27,500,515 | 5,143,288 |
| 1980 | 26,711,099 | 5,047,419 |
| 1979 | 25,886,782 | 4,959,283 |
| 1978 | 24,992,689 | 4,877,854 |
| 1977 | 24,229,061 | 4,801,128 |
| 1976 | 23,624,031 | 4,727,022 |
| 1975 | 23,021,101 | 4,653,876 |
| 1974 | 22,418,878 | 4,580,510 |
| 1973 | 21,827,665 | 4,506,324 |
| 1972 | 21,251,160 | 4,431,292 |
| 1971 | 20,695,569 | 4,355,200 |
| 1970 | 20,137,436 | 4,277,535 |
| 1969 | 19,570,445 | 4,198,300 |
| 1968 | 19,012,189 | 4,118,550 |
| 1967 | 18,462,782 | 4,040,153 |
| 1966 | 17,931,929 | 3,964,155 |
| 1965 | 17,427,802 | 3,890,716 |
| 1964 | 16,955,327 | 3,819,722 |
| 1963 | 16,507,599 | 3,750,954 |
| 1962 | 16,075,724 | 3,684,273 |
| 1961 | 15,662,374 | 3,619,551 |
| 1960 | 15,264,846 | 3,556,749 |
Data sources: United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10); World Bank | Health (1960–2024, retrieved 2026-04-06).
GeoRank.org/population/dr-congo/guinea | CC BY
From 2006 to 2016, the population of the DR Congo increased by 23,340,507 people (a 38.5% growth), while Guinea gained 2,631,859 people (a 27.9% growth).
For the next 10 years, from 2016 to 2026, the DR Congo gained 33,551,386 people (a 40% growth), while Guinea's population increased by 3,473,205 people (a 28.8% growth).
The DR Congo was ranked 22nd most populous country in 2006 and is 15th in 2026. Guinea was ranked 84th in 2006 and ranked 75th now.
The UN's World Population Prospects forecasts that in 24 years (in 2050) the DR Congo's population will grow by 86.7% to 219,397,034 people with a rank change from 15th to 8th. The population of Guinea will increase by 51.3% to 23,524,366 people and rank change from 75th to 71st.
The DR Congo is projected to reach its peak in 2100 at 436M people compared to the peak of 32.4M people in 2100 for Guinea.
Population growth rate by year
| Year | Growth rate | |
|---|---|---|
|
|
|
|
| 2100 | 0.68% | 0.09% |
| 2099 | 0.71% | 0.1% |
| 2098 | 0.73% | 0.12% |
| 2097 | 0.75% | 0.13% |
| 2096 | 0.78% | 0.13% |
| 2095 | 0.81% | 0.16% |
| 2094 | 0.83% | 0.18% |
| 2093 | 0.85% | 0.21% |
| 2092 | 0.88% | 0.2% |
| 2091 | 0.91% | 0.23% |
| 2090 | 0.94% | 0.26% |
| 2089 | 0.97% | 0.28% |
| 2088 | 0.99% | 0.29% |
| 2087 | 1.03% | 0.33% |
| 2086 | 1.05% | 0.37% |
| 2085 | 1.08% | 0.38% |
| 2084 | 1.11% | 0.41% |
| 2083 | 1.13% | 0.42% |
| 2082 | 1.16% | 0.47% |
| 2081 | 1.19% | 0.46% |
| 2080 | 1.21% | 0.5% |
| 2079 | 1.25% | 0.51% |
| 2078 | 1.27% | 0.53% |
| 2077 | 1.31% | 0.56% |
| 2076 | 1.33% | 0.6% |
| 2075 | 1.36% | 0.61% |
| 2074 | 1.39% | 0.63% |
| 2073 | 1.42% | 0.66% |
| 2072 | 1.45% | 0.7% |
| 2071 | 1.49% | 0.71% |
| 2070 | 1.52% | 0.75% |
| 2069 | 1.56% | 0.78% |
| 2068 | 1.59% | 0.81% |
| 2067 | 1.62% | 0.84% |
| 2066 | 1.66% | 0.86% |
| 2065 | 1.69% | 0.89% |
| 2064 | 1.73% | 0.93% |
| 2063 | 1.77% | 0.96% |
| 2062 | 1.8% | 0.98% |
| 2061 | 1.84% | 1% |
| 2060 | 1.88% | 1.05% |
| 2059 | 1.91% | 1.1% |
| 2058 | 1.95% | 1.11% |
| 2057 | 1.98% | 1.15% |
| 2056 | 2.02% | 1.19% |
| 2055 | 2.06% | 1.21% |
| 2054 | 2.1% | 1.27% |
| 2053 | 2.14% | 1.29% |
| 2052 | 2.17% | 1.32% |
| 2051 | 2.21% | 1.35% |
| 2050 | 2.24% | 1.36% |
| 2049 | 2.28% | 1.39% |
| 2048 | 2.31% | 1.43% |
| 2047 | 2.35% | 1.47% |
| 2046 | 2.38% | 1.5% |
| 2045 | 2.41% | 1.52% |
| 2044 | 2.44% | 1.58% |
| 2043 | 2.47% | 1.61% |
| 2042 | 2.51% | 1.64% |
| 2041 | 2.54% | 1.69% |
| 2040 | 2.57% | 1.71% |
| 2039 | 2.61% | 1.73% |
| 2038 | 2.64% | 1.76% |
| 2037 | 2.7% | 1.8% |
| 2036 | 2.75% | 1.82% |
| 2035 | 2.8% | 1.83% |
| 2034 | 2.85% | 1.9% |
| 2033 | 2.89% | 1.95% |
| 2032 | 2.95% | 1.99% |
| 2031 | 3% | 2.06% |
| 2030 | 3.05% | 2.08% |
| 2029 | 3.1% | 2.14% |
| 2028 | 3.14% | 2.2% |
| 2027 | 3.18% | 2.23% |
| 2026 | 3.24% | 2.3% |
| 2025 | 3.27% | 2.38% |
| 2024 | 3.3% | 2.42% |
| 2023 | 3.31% | 2.49% |
| 2022 | 3.28% | 2.51% |
| 2021 | 3.29% | 2.54% |
| 2020 | 3.27% | 2.58% |
| 2019 | 3.22% | 2.59% |
| 2018 | 3.4% | 2.58% |
| 2017 | 3.72% | 2.59% |
| 2016 | 3.6% | 2.6% |
| 2015 | 3.36% | 2.56% |
| 2014 | 3.45% | 2.51% |
| 2013 | 3.46% | 2.47% |
| 2012 | 3.39% | 2.48% |
| 2011 | 3.33% | 2.51% |
| 2010 | 3.24% | 2.49% |
| 2009 | 3.14% | 2.47% |
| 2008 | 3.06% | 2.45% |
| 2007 | 3.07% | 2.34% |
| 2006 | 3.13% | 2.11% |
| 2005 | 3.12% | 2.02% |
| 2004 | 2.99% | 2.16% |
| 2003 | 2.96% | 2.27% |
| 2002 | 3.1% | 1.57% |
| 2001 | 3.22% | 1.32% |
| 2000 | 3.26% | 1.98% |
| 1999 | 3.42% | 2.27% |
| 1998 | 2.75% | 1.9% |
| 1997 | 1.62% | 2.08% |
| 1996 | 1.94% | 2.87% |
| 1995 | 4.24% | 2.83% |
| 1994 | 4.85% | 3.04% |
| 1993 | 3.64% | 3.09% |
| 1992 | 3.44% | 3.24% |
| 1991 | 3.38% | 4.08% |
| 1990 | 3.37% | 3.52% |
| 1989 | 3.21% | 2.63% |
| 1988 | 3.25% | 2.65% |
| 1987 | 3.2% | 2.6% |
| 1986 | 3.2% | 2.5% |
| 1985 | 3.37% | 2.38% |
| 1984 | 3.4% | 2.24% |
| 1983 | 3.22% | 2.14% |
| 1982 | 3.05% | 2.03% |
| 1981 | 2.96% | 1.9% |
| 1980 | 3.18% | 1.78% |
| 1979 | 3.58% | 1.67% |
| 1978 | 3.15% | 1.6% |
| 1977 | 2.56% | 1.57% |
| 1976 | 2.62% | 1.57% |
| 1975 | 2.69% | 1.6% |
| 1974 | 2.71% | 1.65% |
| 1973 | 2.71% | 1.69% |
| 1972 | 2.68% | 1.75% |
| 1971 | 2.77% | 1.82% |
| 1970 | 2.9% | 1.89% |
| 1969 | 2.94% | 1.94% |
| 1968 | 2.98% | 1.94% |
| 1967 | 2.96% | 1.92% |
| 1966 | 2.89% | 1.89% |
| 1965 | 2.79% | 1.86% |
| 1964 | 2.71% | 1.83% |
| 1963 | 2.69% | 1.81% |
| 1962 | 2.64% | 1.79% |
| 1961 | 2.6% | 1.77% |
Data sources: United Nations | World Population Prospects (2025–2100, retrieved 2026-03-10); World Bank | Health (1961–2024, retrieved 2026-04-06).
GeoRank.org/population/dr-congo/guinea | CC BY
In 2024, the population of the DR Congo grew by 3.3%, while Guinea's population grew by 2.42%.
Live population counters
|
|
|
|
|---|---|---|
| Current population |
117507801
|
15546235
|
| Population rank | 15/197 | 75/197 |
| Percent of world population | 1.42% | 0.19% |
| One net population change |
9.05 seconds
|
1.5 minutes
|
| One birth every |
7.22 seconds
|
1.08 minutes
|
| One death every |
35 seconds
|
4 minutes
|
| Daily growth/decline | +9,552 | +957 |
| Annual growth/decline | +3,486,534 | +349,317 |
| Annual growth/decline rate | +3.3% | +2.42% |
| Population growth rate rank | 11/197 | 32/197 |
| One migration net change every |
19.3 minutes
|
32.4 minutes
|
| Annual migration change | -27,309 | -16,282 |
| Net migration rank | 159/196 | 147/196 |
| Foreign-born residents | 1,085,090 | 117,416 |
| Foreign-born residents rank | 57/195 | 125/195 |
| Foreign-born share of population | 1% | 0.8% |
| Foreign-born share rank | 152/195 | 159/195 |
Natural population change vs migration
| Year | Population change | |||
|---|---|---|---|---|
|
|
|
|||
| Natural | Migration | Natural | Migration | |
| 2025 | - | -27,309 | - | -16,282 |
| 2024 | - | -26,968 | - | -12,024 |
| 2023 | 3,467,787 | -14,992 | 356,147 | -3,997 |
| 2022 | 3,347,664 | -14,991 | 352,517 | -3,997 |
| 2021 | 3,227,992 | -64,639 | 345,121 | -4,373 |
| 2020 | 3,156,152 | -1,633 | 342,289 | -4,365 |
| 2019 | 3,075,538 | -144,920 | 338,984 | -3,240 |
| 2018 | 2,993,184 | -124,246 | 332,585 | -9,187 |
| 2017 | 2,883,245 | 176,290 | 328,542 | -13,718 |
| 2016 | 2,753,687 | 440,748 | 324,608 | -14,189 |
| 2015 | 2,665,016 | -17,711 | 316,604 | -15,117 |
| 2014 | 2,580,251 | 36,966 | 309,539 | -22,741 |
| 2013 | 2,489,378 | 121,097 | 304,430 | -29,136 |
| 2012 | 2,405,462 | 53,668 | 298,094 | -32,808 |
| 2011 | 2,310,679 | 40,891 | 293,318 | -29,069 |
| 2010 | 2,212,255 | 8,823 | 288,512 | -31,327 |
| 2009 | 2,126,912 | -46,009 | 281,920 | -34,007 |
| 2008 | 2,044,210 | -82,339 | 274,327 | -32,925 |
| 2007 | 1,963,738 | -99,742 | 266,070 | -34,311 |
| 2006 | 1,889,398 | -29,715 | 258,518 | -48,078 |
| 2005 | 1,800,300 | 20,384 | 251,209 | -71,015 |
| 2004 | 1,731,022 | 4,260 | 242,075 | -56,036 |
| 2003 | 1,679,188 | -106,731 | 234,774 | -36,934 |
| 2002 | 1,631,597 | -17,358 | 229,022 | -33,450 |
| 2001 | 1,594,999 | 26,523 | 227,642 | -155,020 |
| 2000 | 1,549,518 | 79,340 | 227,081 | -77,450 |
| 1999 | 1,450,318 | 109,761 | 223,968 | -46,183 |
| 1998 | 1,375,130 | 295,560 | 219,385 | -30,903 |
| 1997 | 1,392,037 | -527,356 | 220,373 | -107,614 |
| 1996 | 1,380,490 | -777,833 | 214,896 | -4,973 |
| 1995 | 1,395,440 | -273,434 | 205,644 | 18,021 |
| 1994 | 1,259,539 | 1,232,105 | 201,439 | -8,826 |
| 1993 | 1,209,242 | 240,176 | 195,612 | 45,616 |
| 1992 | 1,152,781 | 252,666 | 189,682 | -3,285 |
| 1991 | 1,114,033 | 86,721 | 181,299 | 66,718 |
| 1990 | 1,063,508 | 219,270 | 169,926 | 107,641 |
| 1989 | 1,027,238 | 84,415 | 164,707 | -5,150 |
| 1988 | 995,278 | 101,314 | 159,566 | -637 |
| 1987 | 959,875 | 111,220 | 154,178 | -350 |
| 1986 | 925,334 | 70,988 | 148,137 | -2,900 |
| 1985 | 885,670 | 118,791 | 142,313 | -6,965 |
| 1984 | 844,956 | 190,045 | 136,640 | -11,439 |
| 1983 | 807,122 | 146,095 | 130,629 | -15,265 |
| 1982 | 774,823 | 97,495 | 126,831 | -17,920 |
| 1981 | 748,371 | 54,656 | 121,223 | -21,367 |
| 1980 | 724,111 | 51,685 | 117,186 | -25,287 |
| 1979 | 691,773 | 181,028 | 113,141 | -28,770 |
| 1978 | 646,411 | 268,974 | 109,415 | -30,933 |
| 1977 | 638,242 | -26,355 | 105,990 | -31,004 |
| 1976 | 624,147 | -25,965 | 102,449 | -29,220 |
| 1975 | 608,655 | -972 | 99,267 | -26,221 |
| 1974 | 593,539 | 3,216 | 96,315 | -22,637 |
| 1973 | 578,280 | 7,414 | 93,764 | -19,065 |
| 1972 | 564,495 | 2,840 | 91,147 | -15,782 |
| 1971 | 549,343 | -5,497 | 88,358 | -11,543 |
| 1970 | 533,300 | 39,116 | 85,418 | -6,906 |
| 1969 | 514,800 | 46,778 | 82,799 | -2,844 |
| 1968 | 497,682 | 57,274 | 79,892 | -345 |
| 1967 | 479,552 | 64,307 | 77,251 | 0 |
| 1966 | 463,397 | 54,443 | 74,748 | 0 |
| 1965 | 429,002 | 61,397 | 72,134 | 0 |
| 1964 | 406,334 | 48,207 | 69,848 | 0 |
| 1963 | 398,972 | 41,960 | 67,690 | 0 |
| 1962 | 383,406 | 39,431 | 65,672 | 0 |
| 1961 | 368,207 | 35,654 | 63,766 | 0 |
| 1960 | 363,517 | 27,673 | 61,848 | 0 |
Data sources: World Bank | Health (1960–2025, retrieved 2026-04-06).
GeoRank.org/population/dr-congo/guinea | CC BY
Over the last 10 years, 99.1% of the population change in the DR Congo is from natural causes (a gain of 30,150,516 people) and 0.89% is from migration (a gain of 270,872 people). In Guinea 97.2% is from natural causes (a gain of 3,346,936 people) and 2.76% is from migration (a loss of 94,924 people).
As of 2024, 1,085,090 residents or 1% of the population were not native-born in the DR Congo, compared to 117,416 people or 0.8% in Guinea.
Biggest cities by population
Compare countries by 7 more topics
Population differences between the DR Congo and Guinea
|
|
|
|
|---|---|---|
| Life expectancy | 62.4 years | 61.2 years |
| Average age | 21.9 years | 23.4 years |
| Median age | 16.9 years | 19.2 years |
| Male:Female ratio | 49.6:50.4 | 49.5:50.5 |
| Fertility rate | 6.05 births per woman | 4.22 births per woman |
| Population density | 133.1 ppl/mi² | 162.9 ppl/mi² |
Population map with other countries
Data sources: World Bank | Health (1960–2024, retrieved 2026-04-06); United Nations | World Population Prospects (1960–2026, retrieved 2026-03-10); U.S. Census Bureau (1960–2025, retrieved 2026-02-08); Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-02-20).
GeoRank.org/population/dr-congo/guinea | CC BY
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Data sources:
- World Bank | Health (1960–2025, retrieved 2026-04-06)
- United Nations | World Population Prospects (1960–2100, retrieved 2026-03-10)
- U.S. Census Bureau (1960–2025, retrieved 2026-02-08)
- Central Intelligence Agency (CIA) (2000–2019, retrieved 2026-02-20)
- Wikidata (2026, retrieved 2026-02-08)
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.