Fertility & birth rates in Bulgaria and Sao Tome and Principe

Fertility rate in Bulgaria vs Sao Tome and Principe by year

Chart Table

Bulgaria

Sao Tome and Principe

1x

Year	Fertility rate
	Bulgaria	Sao Tome
2023	1.81	3.64
2022	1.78	3.7
2021	1.8	3.76
2020	1.77	3.83
2019	1.79	3.9
2018	1.73	3.98
2017	1.71	4.07
2016	1.67	4.2
2015	1.64	4.35
2014	1.62	4.49
2013	1.54	4.58
2012	1.5	4.66
2011	1.51	4.72
2010	1.57	4.77
2009	1.66	4.84
2008	1.56	4.91
2007	1.49	4.96
2006	1.44	4.93
2005	1.37	4.94
2004	1.33	4.96
2003	1.26	5.01
2002	1.23	5.06
2001	1.21	5.1
2000	1.26	5.16
1999	1.23	5.23
1998	1.11	5.3
1997	1.09	5.4
1996	1.23	5.47
1995	1.23	5.55
1994	1.37	5.56
1993	1.46	5.64
1992	1.55	5.7
1991	1.66	5.77
1990	1.82	5.83
1989	1.9	5.88
1988	1.97	5.94
1987	1.96	5.99
1986	2.02	6.05
1985	1.97	6.1
1984	2.01	6.16
1983	2.01	6.22
1982	2.01	6.28
1981	2	6.33
1980	2.05	6.39
1979	2.16	6.43
1978	2.15	6.47
1977	2.21	6.5
1976	2.24	6.52
1975	2.23	6.53
1974	2.29	6.53
1973	2.15	6.53
1972	2.03	6.51
1971	2.1	6.49
1970	2.17	6.47
1969	2.27	6.44
1968	2.27	6.42
1967	2.02	6.39
1966	2.03	6.37
1965	2.09	6.35
1964	2.19	6.33
1963	2.21	6.31
1962	2.24	6.28
1961	2.29	6.26
1960	2.31	6.24

According to the latest available data on birth rates, the fertility rate in Bulgaria was 1.81 children per woman in 2023, compared to 3.64 in Sao Tome and Principe in 2023. The replacement level is considered to be 2.1 children per woman.

Check Bulgaria vs Sao Tome and Principe population clock for a dynamic visualization of the changing population.

Natural population change by year

Chart Table

Bulgaria

Sao Tome and Principe

1x

Year	Natural population change
	Bulgaria	Sao Tome
2023	-43,837	5,221
2022	-62,065	5,102
2021	-90,452	4,954
2020	-65,507	4,874
2019	-46,317	4,932
2018	-46,304	4,957
2017	-45,583	5,007
2016	-42,744	5,125
2015	-44,699	5,269
2014	-41,027	5,381
2013	-37,948	5,449
2012	-40,183	5,501
2011	-37,477	5,445
2010	-34,759	5,391
2009	-26,800	5,349
2008	-32,967	5,297
2007	-37,727	5,226
2006	-39,526	5,057
2005	-42,124	4,897
2004	-40,128	4,810
2003	-44,319	4,702
2002	-46,240	4,591
2001	-44,050	4,471
2000	-41,668	4,334
1999	-39,411	4,221
1998	-52,844	4,120
1997	-58,185	4,041
1996	-45,159	3,993
1995	-42,030	3,948
1994	-32,086	3,860
1993	-24,569	3,841
1992	-18,789	3,822
1991	-14,675	3,801
1990	-3,487	3,719
1989	5,326	3,576
1988	9,879	3,544
1987	8,971	3,440
1986	16,125	3,180
1985	11,649	3,242
1984	20,610	3,163
1983	21,455	3,100
1982	24,077	3,047
1981	29,341	3,015
1980	30,129	2,965
1979	40,599	2,893
1978	44,070	2,800
1977	47,543	2,705
1976	56,055	2,608
1975	54,941	2,515
1974	64,223	2,422
1973	57,760	2,329
1972	47,169	2,232
1971	52,925	2,127
1970	61,125	1,980
1969	63,256	1,862
1968	69,468	1,767
1967	49,861	1,693
1966	54,504	1,642
1965	58,249	1,611
1964	66,783	1,600
1963	66,241	1,609
1962	64,104	1,625
1961	75,460	1,657
1960	76,314	1,547

The chart above illustrates the comparison of the absolute yearly changes in population resulting from births and deaths.

Excluding migration, the natural population change due to births and deaths from 2022 to 2023 was -0.68% in Bulgaria and +2.26% in Sao Tome and Principe.

For the past 10 years, the annual natural population change has been -0.79% in Bulgaria and +2.4% in Sao Tome and Principe.

Birth rate in Bulgaria vs Sao Tome and Principe by year

Chart Table

Bulgaria

Sao Tome and Principe

Annual births per 1,000 people

1x

Year	Annual births per 1,000 people
	Bulgaria	Sao Tome
2023	8.9	28.2
2022	8.8	28.3
2021	9	28.5
2020	9	28.6
2019	9.3	29.2
2018	9.3	29.8
2017	9.4	30.6
2016	9.4	31.7
2015	9.4	33
2014	9.6	34.3
2013	9.3	35.4
2012	9.5	36.4
2011	9.6	36.8
2010	10.2	37.3
2009	10.9	37.9
2008	10.4	38.5
2007	10	38.9
2006	9.7	38.9
2005	9.3	39
2004	9.1	39.2
2003	8.7	39.6
2002	8.5	39.8
2001	8.5	40
2000	9	39.7
1999	8.8	39.4
1998	7.9	39.2
1997	7.7	39.2
1996	8.6	39.3
1995	8.6	39.5
1994	9.4	39.4
1993	10	39.8
1992	10.4	40.2
1991	11.1	40.7
1990	12.1	40.7
1989	12.6	40.9
1988	13.1	40.9
1987	13	41
1986	13.4	41
1985	13.3	41
1984	13.6	41.1
1983	13.8	41.2
1982	13.9	41.3
1981	14	41.5
1980	14.5	41.6
1979	15.3	41.6
1978	15.5	41.4
1977	16.1	41.3
1976	16.5	41.1
1975	16.6	40.9
1974	17.2	40.6
1973	16.2	40.3
1972	15.3	39.9
1971	15.9	39.5
1970	16.3	38.8
1969	17	38.2
1968	16.9	37.8
1967	15	37.7
1966	14.9	38
1965	15.3	38.6
1964	16.1	39.7
1963	16.4	41.1
1962	16.7	42.7
1961	17.4	44.6
1960	17.8	44.6

The latest reported birth rate per 1,000 people in 2023 was 8.9 in Bulgaria and 28.2 in Sao Tome and Principe, compared with 17.8 and 44.6, respectively, in 1960.

Children 0-14 years as share of population

Chart Table

Bulgaria

Factual

UN forecast

Sao Tome and Principe

Factual

UN forecast

1x

Year	Young
	Bulgaria	Sao Tome
2100	13%	19.5%
2099	13.1%	19.6%
2098	13.1%	19.8%
2097	13.1%	19.9%
2096	13.2%	20%
2095	13.2%	20.2%
2094	13.3%	20.3%
2093	13.4%	20.4%
2092	13.4%	20.6%
2091	13.4%	20.7%
2090	13.5%	20.9%
2089	13.5%	21.1%
2088	13.6%	21.2%
2087	13.6%	21.4%
2086	13.6%	21.6%
2085	13.6%	21.8%
2084	13.6%	22%
2083	13.6%	22.2%
2082	13.6%	22.4%
2081	13.6%	22.6%
2080	13.6%	22.9%
2079	13.6%	23.1%
2078	13.6%	23.3%
2077	13.6%	23.5%
2076	13.6%	23.7%
2075	13.5%	24%
2074	13.5%	24.2%
2073	13.5%	24.4%
2072	13.5%	24.6%
2071	13.5%	24.8%
2070	13.5%	25%
2069	13.6%	25.2%
2068	13.6%	25.4%
2067	13.6%	25.6%
2066	13.6%	25.9%
2065	13.6%	26.1%
2064	13.7%	26.3%
2063	13.7%	26.5%
2062	13.7%	26.8%
2061	13.8%	27%
2060	13.8%	27.3%
2059	13.8%	27.5%
2058	13.9%	27.8%
2057	13.9%	28.1%
2056	13.9%	28.4%
2055	13.9%	28.7%
2054	13.9%	29%
2053	13.9%	29.4%
2052	13.9%	29.7%
2051	13.8%	30.1%
2050	13.8%	30.4%
2049	13.8%	30.8%
2048	13.7%	31.1%
2047	13.7%	31.5%
2046	13.6%	31.8%
2045	13.6%	32.1%
2044	13.6%	32.5%
2043	13.6%	32.8%
2042	13.6%	33.1%
2041	13.6%	33.4%
2040	13.6%	33.6%
2039	13.6%	33.9%
2038	13.7%	34.1%
2037	13.7%	34.4%
2036	13.7%	34.6%
2035	13.7%	34.7%
2034	13.8%	34.9%
2033	13.8%	35.1%
2032	13.9%	35.3%
2031	14%	35.5%
2030	14.1%	35.8%
2029	14.2%	36.1%
2028	14.2%	36.6%
2027	14.3%	37%
2026	14.4%	37.3%
2025	14.4%	37.6%
2024	14.5%	37.8%
2023	14.5%	38.3%
2022	14.5%	38.8%
2021	14.5%	39.4%
2020	14.4%	39.9%
2019	14.4%	40.5%
2018	14.3%	40.9%
2017	14.2%	41.4%
2016	14%	41.7%
2015	13.9%	41.9%
2014	13.8%	42%
2013	13.7%	42%
2012	13.6%	42%
2011	13.5%	42%
2010	13.5%	42.1%
2009	13.4%	42.1%
2008	13.3%	42.1%
2007	13.4%	42%
2006	13.5%	42%
2005	13.7%	42%
2004	14%	42.1%
2003	14.4%	42.2%
2002	14.8%	42.3%
2001	15.2%	42.5%
2000	15.7%	42.8%
1999	16.1%	43.4%
1998	16.5%	43.9%
1997	17%	44.3%
1996	17.4%	44.7%
1995	17.9%	44.9%
1994	18.3%	45.1%
1993	18.8%	45.2%
1992	19.3%	45.2%
1991	19.8%	45.1%
1990	20.3%	45.1%
1989	20.8%	45%
1988	21.1%	45%
1987	21.3%	44.9%
1986	21.4%	44.7%
1985	21.6%	44.5%
1984	21.8%	44.4%
1983	22%	44.5%
1982	22.1%	44.5%
1981	22.1%	44.7%
1980	22.1%	44.9%
1979	22.1%	45.1%
1978	22.2%	45.2%
1977	22.2%	45.3%
1976	22.3%	45.4%
1975	22.3%	45.5%
1974	22.2%	45.6%
1973	22.3%	45.7%
1972	22.4%	45.9%
1971	22.6%	46.1%
1970	22.8%	46.2%
1969	23%	45.8%
1968	23.2%	44.9%
1967	23.4%	44%
1966	23.8%	42.9%
1965	24.2%	41.6%
1964	24.7%	40.2%
1963	25.1%	38.5%
1962	25.4%	36.6%
1961	25.8%	34.3%
1960	26.1%	32.9%

Children aged 0-14 make up 14.5% of the population in Bulgaria and 37.8% in Sao Tome and Principe in 2024, compared to 20.3% and 45.1% respectively in 1990.

Demographics of Bulgaria and Sao Tome and Principe compared.

Maternal mortality chart: Bulgaria vs Sao Tome and Principe

Chart Table

Bulgaria

Sao Tome and Principe

1x

Year	Maternal mortality per 100K births
	Bulgaria	Sao Tome
2023	6	75
2022	10	82
2021	9	98
2020	9	92
2019	6	95
2018	7	100
2017	7	110
2016	7	119
2015	7	128
2014	7	138
2013	7	150
2012	7	158
2011	8	164
2010	9	170
2009	9	172
2008	10	174
2007	11	174
2006	12	177
2005	13	181
2004	14	177
2003	14	178
2002	15	179
2001	17	178
2000	19	180
1999	20	179
1998	20	175
1997	23	173
1996	22	171
1995	23	172
1994	25	168
1993	23	166
1992	25	164
1991	25	166
1990	27	164
1989	25	167
1988	26	157
1987	25	161
1986	25	175
1985	26	159

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 6 deaths per 100,000 live births in Bulgaria, compared to 75 deaths in Sao Tome and Principe.

Under-five mortality rates

Chart Table

Bulgaria

Sao Tome and Principe

Probability that a newborn baby will die before reaching age five

1x

Year	Under 5 mortality rate
	Bulgaria	Sao Tome
2023	0.61%	1.39%
2022	0.62%	1.46%
2021	0.63%	1.53%
2020	0.65%	1.6%
2019	0.67%	1.7%
2018	0.7%	1.81%
2017	0.73%	1.95%
2016	0.77%	2.11%
2015	0.82%	2.31%
2014	0.87%	2.54%
2013	0.93%	2.77%
2012	0.99%	3.04%
2011	1.04%	3.33%
2010	1.08%	3.63%
2009	1.12%	3.95%
2008	1.14%	4.3%
2007	1.18%	4.68%
2006	1.24%	5.11%
2005	1.33%	5.56%
2004	1.42%	6.05%
2003	1.51%	6.57%
2002	1.6%	7.1%
2001	1.68%	7.66%
2000	1.75%	8.21%
1999	1.82%	8.76%
1998	1.89%	9.26%
1997	1.93%	9.73%
1996	1.94%	10.1%
1995	1.92%	10.4%
1994	1.91%	10.7%
1993	1.92%	10.8%
1992	1.92%	10.9%
1991	1.89%	10.9%
1990	1.83%	10.8%
1989	1.79%	10.7%
1988	1.78%	10.6%
1987	1.8%	10.4%
1986	1.87%	11.4%
1985	1.97%	9.99%
1984	2.07%	9.77%
1983	2.15%	9.56%
1982	2.22%	9.37%
1981	2.3%	9.21%
1980	2.38%	9.1%
1979	2.49%	9.02%
1978	2.6%	8.96%
1977	2.72%	8.93%
1976	2.8%	8.89%
1975	2.86%	8.85%
1974	2.91%	8.79%
1973	2.95%	8.73%
1972	3.01%	8.67%
1971	3.11%	8.63%
1970	3.25%	8.64%
1969	3.4%	8.71%
1968	3.54%	8.85%
1967	3.64%	9.04%
1966	3.7%	9.29%
1965	3.75%	9.56%
1964	3.86%	-
1963	4.08%	-
1962	4.43%	-
1961	4.89%	-
1960	5.47%	-

The chance that a newborn baby will die before reaching age five is 0.61% in Bulgaria and 1.39% in Sao Tome and Principe. Above is a chart with historical data on under-five mortality rates.