Fertility & birth rates in Comoros and Sao Tome and Principe

Fertility rate in Comoros vs Sao Tome and Principe chart

According to the latest available data on birth rates, the fertility rate in Comoros was 3.88 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 Comoros vs Sao Tome and Principe population clock for a dynamic visualization of the changing population.

The chart below showcases historical changes in the birth rates.

Table

Year	Fertility rate
	Comoros	Sao Tome
1960	6.79	6.24
1961	6.85	6.26
1962	6.9	6.28
1963	6.92	6.31
1964	6.94	6.33
1965	6.97	6.35
1966	7	6.37
1967	7.02	6.39
1968	7.05	6.42
1969	7.07	6.44
1970	7.1	6.47
1971	7.12	6.49
1972	7.14	6.51
1973	7.17	6.53
1974	7.16	6.53
1975	7.16	6.53
1976	7.16	6.52
1977	7.15	6.5
1978	7.16	6.47
1979	7.16	6.43
1980	7.15	6.39
1981	7.14	6.33
1982	7.13	6.28
1983	7.11	6.22
1984	7.07	6.16
1985	7.02	6.1
1986	6.95	6.05
1987	6.87	5.99
1988	6.76	5.94
1989	6.65	5.88
1990	6.51	5.83
1991	6.35	5.77
1992	6.19	5.7
1993	6.02	5.64
1994	5.86	5.56
1995	5.73	5.55
1996	5.63	5.47
1997	5.51	5.4
1998	5.39	5.3
1999	5.28	5.23
2000	5.23	5.16
2001	5.2	5.1
2002	5.16	5.06
2003	5.12	5.01
2004	5.07	4.96
2005	5.01	4.94
2006	4.93	4.93
2007	4.86	4.96
2008	4.81	4.91
2009	4.78	4.84
2010	4.76	4.77
2011	4.72	4.72
2012	4.65	4.66
2013	4.57	4.58
2014	4.49	4.49
2015	4.42	4.35
2016	4.35	4.2
2017	4.28	4.07
2018	4.21	3.98
2019	4.14	3.9
2020	4.07	3.83
2021	4	3.76
2022	3.94	3.7
2023	3.88	3.64
2024	3.82	3.6
2025	3.76	3.53
2026	3.71	3.47
2027	3.65	3.42
2028	3.6	3.36
2029	3.55	3.32
2030	3.5	3.26
2031	3.44	3.21
2032	3.4	3.17
2033	3.36	3.13
2034	3.31	3.09
2035	3.27	3.04
2036	3.23	3.01
2037	3.19	2.97
2038	3.15	2.94
2039	3.11	2.9
2040	3.07	2.87
2041	3.04	2.83
2042	3	2.8
2043	2.97	2.78
2044	2.93	2.75
2045	2.9	2.73
2046	2.87	2.7
2047	2.84	2.67
2048	2.81	2.64
2049	2.78	2.62
2050	2.76	2.59

Children 0-14 years as share of population

Table

Year	Share of people 0-14 years old
	Comoros	Sao Tome
1960	41.6%	32.9%
1961	42%	34.3%
1962	42.5%	36.6%
1963	43.1%	38.5%
1964	43.7%	40.2%
1965	44.1%	41.6%
1966	44.5%	42.9%
1967	44.9%	44%
1968	45.3%	44.9%
1969	45.6%	45.8%
1970	45.8%	46.2%
1971	45.9%	46.1%
1972	46%	45.9%
1973	46.2%	45.7%
1974	46.3%	45.6%
1975	46.4%	45.5%
1976	46.6%	45.4%
1977	46.7%	45.3%
1978	46.8%	45.2%
1979	46.9%	45.1%
1980	46.9%	44.9%
1981	46.9%	44.7%
1982	46.9%	44.5%
1983	46.9%	44.5%
1984	46.8%	44.4%
1985	46.9%	44.5%
1986	46.9%	44.7%
1987	46.9%	44.9%
1988	46.9%	45%
1989	47%	45%
1990	47%	45.1%
1991	46.9%	45.1%
1992	47.1%	45.2%
1993	47.5%	45.2%
1994	47.7%	45.1%
1995	47.9%	44.9%
1996	47.9%	44.7%
1997	47.9%	44.3%
1998	47.7%	43.9%
1999	47.4%	43.4%
2000	47%	42.8%
2001	46.7%	42.5%
2002	46.6%	42.3%
2003	46.3%	42.2%
2004	45.7%	42.1%
2005	45%	42%
2006	44.3%	42%
2007	43.6%	42%
2008	42.9%	42.1%
2009	42.2%	42.1%
2010	41.6%	42.1%
2011	41%	42%
2012	40.5%	42%
2013	40.2%	42%
2014	40%	42%
2015	39.8%	41.9%
2016	39.6%	41.7%
2017	39.3%	41.4%
2018	38.9%	40.9%
2019	38.6%	40.5%
2020	38.3%	39.9%
2021	38%	39.4%
2022	37.7%	38.8%
2023	37.4%	38.3%
2024	37.1%	37.8%
2025	36.9%	37.5%
2026	36.6%	37.2%
2027	36.3%	36.8%
2028	36%	36.4%
2029	35.7%	36%
2030	35.3%	35.6%
2031	35%	35.4%
2032	34.7%	35.2%
2033	34.4%	35%
2034	34%	34.8%
2035	33.7%	34.7%
2036	33.4%	34.5%
2037	33.1%	34.2%
2038	32.8%	34%
2039	32.5%	33.8%
2040	32.2%	33.5%
2041	32%	33.2%
2042	31.7%	32.9%
2043	31.5%	32.6%
2044	31.2%	32.3%
2045	31%	32%
2046	30.8%	31.6%
2047	30.6%	31.3%
2048	30.3%	31%
2049	30.1%	30.6%
2050	29.9%	30.2%

Children aged 0-14 make up 37.1% of the population in Comoros and 37.8% in Sao Tome and Principe in 2024, compared to 47% and 45.1% respectively in 1990.

Demographics of Comoros and Sao Tome and Principe compared.

Natural population change in Comoros vs Sao Tome and Principe by year

For the past 10 years, the annual natural population change (excluding migration) has been +2.31% in Comoros and +2.4% in Sao Tome and Principe. The chart below illustrates the comparison of the absolute yearly changes resulting from births and deaths.

Table

Year	Population change due to births and deaths
	Comoros	Sao Tome
1960	4,886	1,547
1961	5,027	1,657
1962	5,157	1,625
1963	5,249	1,609
1964	5,359	1,600
1965	5,465	1,611
1966	5,601	1,642
1967	5,741	1,693
1968	5,960	1,767
1969	6,189	1,862
1970	6,456	1,980
1971	6,722	2,127
1972	7,019	2,232
1973	7,328	2,329
1974	7,654	2,422
1975	7,752	2,515
1976	8,371	2,608
1977	8,750	2,705
1978	9,189	2,800
1979	9,637	2,893
1980	10,095	2,965
1981	10,569	3,015
1982	11,002	3,047
1983	11,367	3,100
1984	11,830	3,163
1985	12,202	3,242
1986	12,566	3,180
1987	12,869	3,440
1988	13,144	3,544
1989	13,374	3,576
1990	13,610	3,719
1991	13,783	3,801
1992	13,867	3,822
1993	13,667	3,841
1994	13,465	3,860
1995	13,403	3,948
1996	13,390	3,993
1997	13,254	4,041
1998	13,099	4,120
1999	13,161	4,221
2000	13,270	4,334
2001	13,598	4,471
2002	13,760	4,591
2003	14,031	4,702
2004	14,349	4,810
2005	14,810	4,897
2006	15,124	5,057
2007	15,393	5,226
2008	15,804	5,297
2009	16,315	5,349
2010	16,849	5,391
2011	17,313	5,445
2012	17,565	5,501
2013	17,776	5,449
2014	17,876	5,381
2015	17,961	5,269
2016	17,913	5,125
2017	17,798	5,007
2018	17,883	4,957
2019	17,936	4,932
2020	17,906	4,874
2021	17,645	4,954
2022	18,154	5,102
2023	18,247	5,221

Maternal mortality chart: Comoros vs Sao Tome and Principe

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 179 deaths per 100,000 live births in Comoros, compared to 75 deaths in Sao Tome and Principe.

Table

Year	Maternal mortality per 100K births
	Comoros	Sao Tome
1985	850	159
1986	825	175
1987	811	161
1988	791	157
1989	768	167
1990	737	164
1991	704	166
1992	675	164
1993	642	166
1994	602	168
1995	571	172
1996	545	171
1997	520	173
1998	515	175
1999	486	179
2000	476	180
2001	440	178
2002	428	179
2003	400	178
2004	385	177
2005	373	181
2006	360	177
2007	352	174
2008	334	174
2009	320	172
2010	305	170
2011	291	164
2012	274	158
2013	260	150
2014	247	138
2015	237	128
2016	225	119
2017	219	110
2018	209	100
2019	202	95
2020	198	92
2021	215	98
2022	186	82
2023	179	75

Under-five mortality rates

The chance that a newborn baby will die before reaching age five is 3.98% in Comoros and 1.39% in Sao Tome and Principe. Below is the historical data on under-five mortality rates.

Table

Year	Mortality rate before reaching 5 years of age, per 1,000 live births
	Comoros	Sao Tome
1965	-	9.56%
1966	-	9.29%
1967	-	9.04%
1968	-	8.85%
1969	-	8.71%
1970	23.2%	8.64%
1971	22.5%	8.63%
1972	22%	8.67%
1973	21.4%	8.73%
1974	20.8%	8.79%
1975	20.3%	8.85%
1976	19.7%	8.89%
1977	19.1%	8.93%
1978	18.6%	8.96%
1979	18%	9.02%
1980	17.4%	9.1%
1981	16.8%	9.21%
1982	16.2%	9.37%
1983	15.7%	9.56%
1984	15.1%	9.77%
1985	14.6%	9.99%
1986	14%	11.4%
1987	13.5%	10.4%
1988	13%	10.6%
1989	12.6%	10.7%
1990	12.1%	10.8%
1991	11.6%	10.9%
1992	11.1%	10.9%
1993	10.7%	10.8%
1994	10.2%	10.7%
1995	9.78%	10.4%
1996	9.37%	10.1%
1997	9%	9.73%
1998	8.63%	9.26%
1999	8.28%	8.76%
2000	7.96%	8.21%
2001	7.65%	7.66%
2002	7.36%	7.1%
2003	7.07%	6.57%
2004	6.8%	6.05%
2005	6.55%	5.56%
2006	6.31%	5.11%
2007	6.08%	4.68%
2008	5.88%	4.3%
2009	5.69%	3.95%
2010	5.51%	3.63%
2011	5.36%	3.33%
2012	5.21%	3.04%
2013	5.08%	2.77%
2014	4.97%	2.54%
2015	4.87%	2.31%
2016	4.76%	2.11%
2017	4.66%	1.95%
2018	4.56%	1.81%
2019	4.46%	1.7%
2020	4.35%	1.6%
2021	4.24%	1.53%
2022	4.11%	1.46%
2023	3.98%	1.39%