Fertility & birth rates in Kiribati and Sao Tome and Principe

Fertility rate in Kiribati vs Sao Tome and Principe chart

According to the latest available data on birth rates, the fertility rate in Kiribati was 3.15 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 Kiribati 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
	Kiribati	Sao Tome
1960	6.44	6.24
1961	6.48	6.26
1962	6.42	6.28
1963	6.35	6.31
1964	6.29	6.33
1965	6.26	6.35
1966	6.23	6.37
1967	6.11	6.39
1968	5.98	6.42
1969	5.85	6.44
1970	5.71	6.47
1971	5.55	6.49
1972	5.37	6.51
1973	5.2	6.53
1974	5.09	6.53
1975	5.02	6.53
1976	4.96	6.52
1977	4.96	6.5
1978	4.97	6.47
1979	4.97	6.43
1980	4.96	6.39
1981	4.96	6.33
1982	4.95	6.28
1983	4.91	6.22
1984	4.91	6.16
1985	4.91	6.1
1986	4.87	6.05
1987	4.81	5.99
1988	4.73	5.94
1989	4.69	5.88
1990	4.67	5.83
1991	4.64	5.77
1992	4.57	5.7
1993	4.49	5.64
1994	4.44	5.56
1995	4.42	5.55
1996	4.43	5.47
1997	4.37	5.4
1998	4.29	5.3
1999	4.18	5.23
2000	4.07	5.16
2001	3.96	5.1
2002	3.81	5.06
2003	3.7	5.01
2004	3.73	4.96
2005	3.76	4.94
2006	3.82	4.93
2007	3.87	4.96
2008	3.9	4.91
2009	3.91	4.84
2010	3.9	4.77
2011	3.88	4.72
2012	3.77	4.66
2013	3.64	4.58
2014	3.52	4.49
2015	3.44	4.35
2016	3.38	4.2
2017	3.34	4.07
2018	3.32	3.98
2019	3.29	3.9
2020	3.25	3.83
2021	3.22	3.76
2022	3.18	3.7
2023	3.15	3.64
2024	3.12	3.6
2025	3.09	3.53
2026	3.06	3.47
2027	3.03	3.42
2028	3	3.36
2029	2.97	3.32
2030	2.94	3.26
2031	2.92	3.21
2032	2.89	3.17
2033	2.86	3.13
2034	2.84	3.09
2035	2.81	3.04
2036	2.79	3.01
2037	2.77	2.97
2038	2.74	2.94
2039	2.72	2.9
2040	2.69	2.87
2041	2.67	2.83
2042	2.64	2.8
2043	2.62	2.78
2044	2.6	2.75
2045	2.58	2.73
2046	2.56	2.7
2047	2.54	2.67
2048	2.52	2.64
2049	2.5	2.62
2050	2.48	2.59

Children 0-14 years as share of population

Table

Year	Share of people 0-14 years old
	Kiribati	Sao Tome
1960	43.2%	32.9%
1961	43.5%	34.3%
1962	43.8%	36.6%
1963	44%	38.5%
1964	44%	40.2%
1965	43.9%	41.6%
1966	44.1%	42.9%
1967	44.5%	44%
1968	44.9%	44.9%
1969	45%	45.8%
1970	44.9%	46.2%
1971	44.8%	46.1%
1972	44.8%	45.9%
1973	44.6%	45.7%
1974	44.2%	45.6%
1975	43.7%	45.5%
1976	43.2%	45.4%
1977	42.8%	45.3%
1978	42.3%	45.2%
1979	41.8%	45.1%
1980	41.1%	44.9%
1981	40.5%	44.7%
1982	39.9%	44.5%
1983	39.5%	44.5%
1984	39.2%	44.4%
1985	39.2%	44.5%
1986	39.2%	44.7%
1987	39.4%	44.9%
1988	39.7%	45%
1989	39.9%	45%
1990	40.2%	45.1%
1991	40.5%	45.1%
1992	40.8%	45.2%
1993	41%	45.2%
1994	41.2%	45.1%
1995	41.2%	44.9%
1996	41.1%	44.7%
1997	41%	44.3%
1998	40.8%	43.9%
1999	40.5%	43.4%
2000	40.1%	42.8%
2001	39.8%	42.5%
2002	39.3%	42.3%
2003	38.9%	42.2%
2004	38.4%	42.1%
2005	38%	42%
2006	37.6%	42%
2007	37.3%	42%
2008	37%	42.1%
2009	36.8%	42.1%
2010	36.6%	42.1%
2011	36.4%	42%
2012	36.1%	42%
2013	35.7%	42%
2014	35.4%	42%
2015	35.2%	41.9%
2016	35%	41.7%
2017	35%	41.4%
2018	35.1%	40.9%
2019	35.1%	40.5%
2020	35.2%	39.9%
2021	35.2%	39.4%
2022	35.1%	38.8%
2023	34.9%	38.3%
2024	34.7%	37.8%
2025	34.4%	37.5%
2026	34%	37.2%
2027	33.5%	36.8%
2028	33.1%	36.4%
2029	32.7%	36%
2030	32.4%	35.6%
2031	32%	35.4%
2032	31.7%	35.2%
2033	31.3%	35%
2034	31%	34.8%
2035	30.6%	34.7%
2036	30.3%	34.5%
2037	30%	34.2%
2038	29.7%	34%
2039	29.4%	33.8%
2040	29.2%	33.5%
2041	29%	33.2%
2042	28.8%	32.9%
2043	28.6%	32.6%
2044	28.4%	32.3%
2045	28.3%	32%
2046	28.1%	31.6%
2047	27.9%	31.3%
2048	27.8%	31%
2049	27.6%	30.6%
2050	27.4%	30.2%

Children aged 0-14 make up 34.7% of the population in Kiribati and 37.8% in Sao Tome and Principe in 2024, compared to 40.2% and 45.1% respectively in 1990.

Demographics of Kiribati and Sao Tome and Principe compared.

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

For the past 10 years, the annual natural population change (excluding migration) has been +2.05% in Kiribati 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
	Kiribati	Sao Tome
1960	1,141	1,547
1961	1,199	1,657
1962	1,233	1,625
1963	1,273	1,609
1964	1,318	1,600
1965	1,376	1,611
1966	1,437	1,642
1967	1,417	1,693
1968	1,393	1,767
1969	1,367	1,862
1970	1,388	1,980
1971	1,406	2,127
1972	1,406	2,232
1973	1,409	2,329
1974	1,430	2,422
1975	1,423	2,515
1976	1,425	2,608
1977	1,426	2,705
1978	1,480	2,800
1979	1,509	2,893
1980	1,571	2,965
1981	1,635	3,015
1982	1,697	3,047
1983	1,748	3,100
1984	1,813	3,163
1985	1,881	3,242
1986	1,933	3,180
1987	1,982	3,440
1988	2,022	3,544
1989	2,073	3,576
1990	2,127	3,719
1991	2,176	3,801
1992	2,173	3,822
1993	2,161	3,841
1994	2,168	3,860
1995	2,183	3,948
1996	2,217	3,993
1997	2,220	4,041
1998	2,210	4,120
1999	2,186	4,221
2000	2,153	4,334
2001	2,121	4,471
2002	2,074	4,591
2003	2,045	4,702
2004	2,118	4,810
2005	2,188	4,897
2006	2,285	5,057
2007	2,393	5,226
2008	2,493	5,297
2009	2,573	5,349
2010	2,644	5,391
2011	2,709	5,445
2012	2,678	5,501
2013	2,629	5,449
2014	2,577	5,381
2015	2,555	5,269
2016	2,546	5,125
2017	2,549	5,007
2018	2,561	4,957
2019	2,560	4,932
2020	2,497	4,874
2021	2,408	4,954
2022	2,522	5,102
2023	2,487	5,221

Maternal mortality chart: Kiribati 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 80 deaths per 100,000 live births in Kiribati, compared to 75 deaths in Sao Tome and Principe.

Table

Year	Maternal mortality per 100K births
	Kiribati	Sao Tome
1985	246	159
1986	232	175
1987	231	161
1988	220	157
1989	212	167
1990	199	164
1991	188	166
1992	175	164
1993	162	166
1994	150	168
1995	148	172
1996	141	171
1997	132	173
1998	126	175
1999	121	179
2000	119	180
2001	113	178
2002	109	179
2003	105	178
2004	106	177
2005	104	181
2006	102	177
2007	101	174
2008	100	174
2009	99	172
2010	102	170
2011	98	164
2012	98	158
2013	93	150
2014	91	138
2015	90	128
2016	88	119
2017	90	110
2018	87	100
2019	89	95
2020	89	92
2021	122	98
2022	86	82
2023	80	75

Under-five mortality rates

The chance that a newborn baby will die before reaching age five is 5.51% in Kiribati 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
	Kiribati	Sao Tome
1960	19.9%	-
1961	19.5%	-
1962	18.9%	-
1963	18.3%	-
1964	17.7%	-
1965	17.1%	9.56%
1966	16.4%	9.29%
1967	15.8%	9.04%
1968	15.2%	8.85%
1969	14.6%	8.71%
1970	14.1%	8.64%
1971	13.7%	8.63%
1972	13.3%	8.67%
1973	13%	8.73%
1974	12.7%	8.79%
1975	12.5%	8.85%
1976	12.4%	8.89%
1977	12.3%	8.93%
1978	12.2%	8.96%
1979	12%	9.02%
1980	11.9%	9.1%
1981	11.7%	9.21%
1982	11.6%	9.37%
1983	11.4%	9.56%
1984	11.1%	9.77%
1985	10.9%	9.99%
1986	10.6%	11.4%
1987	10.2%	10.4%
1988	9.87%	10.6%
1989	9.5%	10.7%
1990	9.13%	10.8%
1991	8.77%	10.9%
1992	8.44%	10.9%
1993	8.13%	10.8%
1994	7.87%	10.7%
1995	7.64%	10.4%
1996	7.42%	10.1%
1997	7.22%	9.73%
1998	7.02%	9.26%
1999	6.83%	8.76%
2000	6.64%	8.21%
2001	6.46%	7.66%
2002	6.31%	7.1%
2003	6.2%	6.57%
2004	6.13%	6.05%
2005	6.07%	5.56%
2006	6.03%	5.11%
2007	5.99%	4.68%
2008	5.93%	4.3%
2009	5.87%	3.95%
2010	5.82%	3.63%
2011	5.79%	3.33%
2012	5.78%	3.04%
2013	5.8%	2.77%
2014	5.84%	2.54%
2015	5.89%	2.31%
2016	5.95%	2.11%
2017	5.99%	1.95%
2018	5.98%	1.81%
2019	5.93%	1.7%
2020	5.86%	1.6%
2021	5.76%	1.53%
2022	5.65%	1.46%
2023	5.51%	1.39%