Fertility & birth rates in Saint Kitts and Nevis and Tonga

Fertility rate in Saint Kitts and Nevis vs Tonga chart

According to the latest available data on birth rates, the fertility rate in Saint Kitts and Nevis was 1.51 children per woman in 2023, compared to 3.13 in Tonga in 2023. The replacement level is considered to be 2.1 children per woman.

Check Saint Kitts and Nevis vs Tonga population clock for a dynamic visualization of the changing population.

The chart below showcases historical changes in the birth rates.

Table

Year	Fertility rate
	Saint Kitts	Tonga
1960	6.54	6.65
1961	6.27	6.61
1962	6.06	6.57
1963	6.12	6.52
1964	6.08	6.46
1965	6.01	6.41
1966	5.78	6.35
1967	5.46	6.29
1968	5.17	6.23
1969	4.97	6.17
1970	4.73	6.07
1971	4.51	5.96
1972	4.16	5.86
1973	3.97	5.8
1974	3.81	5.77
1975	3.68	5.75
1976	3.59	5.73
1977	3.48	5.7
1978	3.29	5.68
1979	3.23	5.65
1980	3.26	5.6
1981	3.3	5.55
1982	3.18	5.5
1983	3.1	5.45
1984	2.88	5.41
1985	2.82	5.34
1986	2.68	5.27
1987	2.62	5.19
1988	2.62	5.1
1989	2.69	5.01
1990	2.73	4.93
1991	2.6	4.85
1992	2.43	4.79
1993	2.38	4.73
1994	2.31	4.66
1995	2.3	4.56
1996	2.26	4.46
1997	2.3	4.38
1998	2.31	4.31
1999	2.26	4.23
2000	2.13	4.16
2001	2.08	4.13
2002	2.04	4.14
2003	2	4.18
2004	1.96	4.19
2005	1.93	4.2
2006	1.9	4.14
2007	1.87	4.09
2008	1.83	4.01
2009	1.8	3.95
2010	1.76	3.88
2011	1.74	3.83
2012	1.71	3.77
2013	1.68	3.7
2014	1.67	3.62
2015	1.64	3.54
2016	1.63	3.46
2017	1.61	3.39
2018	1.59	3.33
2019	1.57	3.27
2020	1.55	3.23
2021	1.53	3.2
2022	1.51	3.17
2023	1.51	3.13
2024	1.53	3.1
2025	1.51	3.07
2026	1.5	3.04
2027	1.49	3
2028	1.49	2.97
2029	1.49	2.95
2030	1.48	2.91
2031	1.48	2.89
2032	1.48	2.85
2033	1.48	2.82
2034	1.48	2.8
2035	1.48	2.77
2036	1.48	2.75
2037	1.49	2.72
2038	1.49	2.7
2039	1.49	2.68
2040	1.49	2.65
2041	1.49	2.63
2042	1.49	2.61
2043	1.5	2.59
2044	1.5	2.56
2045	1.5	2.54
2046	1.5	2.52
2047	1.5	2.5
2048	1.5	2.49
2049	1.5	2.47
2050	1.5	2.45

Children 0-14 years as share of population

Table

Year	Share of people 0-14 years old
	Saint Kitts	Tonga
1960	45.6%	45.7%
1961	45.7%	45.7%
1962	45.8%	45.8%
1963	46%	45.9%
1964	46.1%	45.9%
1965	46.3%	45.9%
1966	46.6%	45.9%
1967	47%	46%
1968	47.4%	46.2%
1969	47.7%	46.3%
1970	47.2%	46.4%
1971	45.8%	46.4%
1972	44.3%	46.3%
1973	42.9%	46.2%
1974	41.6%	46.2%
1975	40.5%	46.2%
1976	39.6%	46.1%
1977	38.8%	45.8%
1978	38.2%	45.3%
1979	37.6%	44.8%
1980	36.9%	44.3%
1981	36.2%	43.9%
1982	35.6%	43.4%
1983	35.1%	42.9%
1984	34.7%	42.4%
1985	34.5%	42%
1986	34.3%	41.7%
1987	34.2%	41.5%
1988	34.1%	41.2%
1989	34.1%	40.9%
1990	34.2%	40.8%
1991	34.1%	40.6%
1992	33.6%	40.5%
1993	32.9%	40.3%
1994	32.3%	40.1%
1995	31.7%	39.9%
1996	31.1%	39.7%
1997	30.6%	39.3%
1998	30.1%	38.9%
1999	29.7%	38.6%
2000	29.3%	38.3%
2001	28.8%	38.2%
2002	28.1%	38.1%
2003	27.4%	38.1%
2004	26.6%	38.2%
2005	26%	38.3%
2006	25.3%	38.3%
2007	24.8%	38.3%
2008	24.4%	38%
2009	24%	37.8%
2010	23.3%	37.6%
2011	22.7%	37.4%
2012	22.2%	37.2%
2013	21.7%	37.1%
2014	21.1%	36.9%
2015	20.6%	36.7%
2016	20.2%	36.5%
2017	19.9%	36.4%
2018	19.6%	36.2%
2019	19.3%	36%
2020	19.1%	35.8%
2021	18.8%	35.7%
2022	18.6%	35.6%
2023	18.3%	35.6%
2024	18.2%	35.4%
2025	18.3%	34.9%
2026	18.4%	34.4%
2027	18.2%	33.8%
2028	17.9%	33.3%
2029	17.7%	32.6%
2030	17.5%	32%
2031	17.2%	31.6%
2032	17%	31.2%
2033	16.8%	31%
2034	16.5%	30.8%
2035	16.3%	30.7%
2036	16.1%	30.5%
2037	15.9%	30.4%
2038	15.7%	30.3%
2039	15.5%	30.2%
2040	15.4%	30.1%
2041	15.2%	30.1%
2042	15.1%	30%
2043	15%	30%
2044	14.8%	29.9%
2045	14.7%	29.8%
2046	14.6%	29.6%
2047	14.5%	29.5%
2048	14.5%	29.2%
2049	14.4%	29%
2050	14.3%	28.7%

Children aged 0-14 make up 18.2% of the population in Saint Kitts and Nevis and 35.4% in Tonga in 2024, compared to 34.2% and 40.8% respectively in 1990.

Demographics of Saint Kitts and Nevis and Tonga compared.

Natural population change in Saint Kitts and Nevis vs Tonga by year

For the past 10 years, the annual natural population change (excluding migration) has been +0.26% in Saint Kitts and Nevis and +1.79% in Tonga. 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
	Saint Kitts	Tonga
1960	1,562	2,230
1961	1,466	2,284
1962	1,373	2,343
1963	1,360	2,394
1964	1,305	2,445
1965	1,228	2,498
1966	1,103	2,550
1967	951	2,603
1968	812	2,614
1969	708	2,632
1970	611	2,628
1971	615	2,611
1972	619	2,605
1973	646	2,617
1974	670	2,650
1975	688	2,709
1976	703	2,769
1977	697	2,822
1978	654	2,862
1979	643	2,884
1980	652	2,885
1981	684	2,882
1982	672	2,853
1983	664	2,840
1984	598	2,814
1985	574	2,762
1986	520	2,704
1987	486	2,646
1988	471	2,649
1989	476	2,644
1990	471	2,641
1991	411	2,637
1992	369	2,622
1993	373	2,594
1994	370	2,547
1995	382	2,476
1996	379	2,393
1997	405	2,332
1998	415	2,344
1999	413	2,352
2000	376	2,346
2001	369	2,358
2002	365	2,396
2003	369	2,448
2004	365	2,478
2005	361	2,495
2006	355	2,459
2007	341	2,423
2008	322	2,397
2009	300	2,358
2010	274	2,332
2011	250	2,298
2012	246	2,255
2013	227	2,199
2014	213	2,135
2015	197	2,064
2016	185	1,989
2017	169	1,912
2018	150	1,873
2019	135	1,841
2020	98	1,816
2021	-20	1,773
2022	14	1,772
2023	84	1,744

Maternal mortality chart: Saint Kitts and Nevis vs Tonga

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 74 deaths per 100,000 live births in Saint Kitts and Nevis, compared to 67 deaths in Tonga.

Table

Year	Maternal mortality per 100K births
	Saint Kitts	Tonga
1985	290	148
1986	285	149
1987	302	147
1988	308	145
1989	316	139
1990	302	138
1991	280	134
1992	255	129
1993	225	127
1994	205	123
1995	204	117
1996	194	113
1997	194	111
1998	193	104
1999	164	99
2000	143	100
2001	131	98
2002	115	98
2003	111	95
2004	104	92
2005	102	92
2006	99	89
2007	96	88
2008	95	88
2009	93	91
2010	92	85
2011	90	84
2012	88	83
2013	82	80
2014	82	80
2015	76	79
2016	75	78
2017	74	77
2018	78	74
2019	74	73
2020	80	74
2021	111	76
2022	99	72
2023	74	67

Under-five mortality rates

The chance that a newborn baby will die before reaching age five is 1.63% in Saint Kitts and Nevis and 0.99% in Tonga. 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
	Saint Kitts	Tonga
1963	-	7.83%
1964	-	7.35%
1965	-	6.89%
1966	-	6.45%
1967	-	6.03%
1968	-	5.63%
1969	-	5.25%
1970	-	4.91%
1971	-	4.61%
1972	-	4.35%
1973	6.16%	4.11%
1974	6.03%	3.9%
1975	5.91%	3.71%
1976	5.78%	3.53%
1977	5.64%	3.37%
1978	5.48%	3.22%
1979	5.29%	3.09%
1980	5.06%	2.97%
1981	4.81%	2.87%
1982	4.53%	2.78%
1983	4.26%	2.7%
1984	4%	2.63%
1985	3.76%	2.57%
1986	3.56%	2.51%
1987	3.39%	2.44%
1988	3.24%	2.37%
1989	3.12%	2.29%
1990	3.03%	2.21%
1991	2.96%	2.14%
1992	2.9%	2.06%
1993	2.85%	2%
1994	2.8%	1.94%
1995	2.76%	1.89%
1996	2.7%	1.85%
1997	2.64%	1.81%
1998	2.56%	1.78%
1999	2.48%	1.74%
2000	2.39%	1.7%
2001	2.29%	1.65%
2002	2.2%	1.61%
2003	2.11%	1.56%
2004	2.03%	1.52%
2005	1.97%	1.48%
2006	1.92%	1.44%
2007	1.89%	1.41%
2008	1.88%	1.37%
2009	1.87%	1.34%
2010	1.88%	1.31%
2011	1.89%	1.29%
2012	1.91%	1.26%
2013	1.93%	1.24%
2014	1.95%	1.22%
2015	1.94%	1.19%
2016	1.93%	1.17%
2017	1.9%	1.15%
2018	1.86%	1.12%
2019	1.82%	1.1%
2020	1.77%	1.08%
2021	1.72%	1.05%
2022	1.68%	1.02%
2023	1.63%	0.99%