Fertility & birth rates in Nauru and Tonga

Fertility rate in Nauru vs Tonga by year

Chart Table

Nauru

Tonga

1x

Year	Fertility rate
	Nauru	Tonga
2023	3.33	3.13
2022	3.38	3.17
2021	3.43	3.2
2020	3.47	3.23
2019	3.53	3.27
2018	3.68	3.33
2017	3.88	3.39
2016	4.03	3.46
2015	4.08	3.54
2014	4.09	3.62
2013	4.1	3.7
2012	4.12	3.77
2011	4.12	3.83
2010	4.02	3.88
2009	3.85	3.95
2008	3.67	4.01
2007	3.5	4.09
2006	3.4	4.14
2005	3.38	4.2
2004	3.38	4.19
2003	3.39	4.18
2002	3.4	4.14
2001	3.46	4.13
2000	3.54	4.16
1999	3.64	4.23
1998	3.68	4.31
1997	3.74	4.38
1996	3.78	4.46
1995	3.81	4.56
1994	3.84	4.66
1993	3.89	4.73
1992	3.95	4.79
1991	3.99	4.85
1990	4.02	4.93
1989	4.07	5.01
1988	4.11	5.1
1987	4.14	5.19
1986	4.15	5.27
1985	4.14	5.34
1984	4.11	5.41
1983	4.06	5.45
1982	3.99	5.5
1981	3.94	5.55
1980	3.88	5.6
1979	3.85	5.65
1978	3.84	5.68
1977	3.86	5.7
1976	3.9	5.73
1975	3.97	5.75
1974	4.07	5.77
1973	4.19	5.8
1972	4.36	5.86
1971	4.54	5.96
1970	4.74	6.07
1969	4.94	6.17
1968	5.14	6.23
1967	5.29	6.29
1966	5.41	6.35
1965	5.48	6.41
1964	5.47	6.46
1963	5.44	6.52
1962	5.42	6.57
1961	5.38	6.61
1960	5.34	6.65

According to the latest available data on birth rates, the fertility rate in Nauru was 3.33 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 Nauru vs Tonga population clock for a dynamic visualization of the changing population.

Natural population change by year

Chart Table

Nauru

Tonga

1x

Year	Natural population change
	Nauru	Tonga
2023	213	1,744
2022	226	1,772
2021	236	1,773
2020	246	1,816
2019	255	1,841
2018	265	1,873
2017	279	1,912
2016	289	1,989
2015	291	2,064
2014	290	2,135
2013	291	2,199
2012	292	2,255
2011	291	2,298
2010	281	2,332
2009	261	2,358
2008	240	2,397
2007	222	2,423
2006	209	2,459
2005	204	2,495
2004	202	2,478
2003	201	2,448
2002	200	2,396
2001	203	2,358
2000	207	2,346
1999	212	2,352
1998	214	2,344
1997	218	2,332
1996	221	2,393
1995	225	2,476
1994	229	2,547
1993	235	2,594
1992	237	2,622
1991	225	2,637
1990	214	2,641
1989	204	2,644
1988	195	2,649
1987	186	2,646
1986	178	2,704
1985	171	2,762
1984	166	2,814
1983	163	2,840
1982	162	2,853
1981	157	2,882
1980	145	2,885
1979	130	2,884
1978	111	2,862
1977	89	2,822
1976	79	2,769
1975	70	2,709
1974	63	2,650
1973	57	2,617
1972	53	2,605
1971	50	2,611
1970	49	2,628
1969	71	2,632
1968	116	2,614
1967	117	2,603
1966	123	2,550
1965	113	2,498
1964	100	2,445
1963	88	2,394
1962	75	2,343
1961	70	2,284
1960	72	2,230

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 +1.8% in Nauru and +1.67% in Tonga.

For the past 10 years, the annual natural population change has been +2.28% in Nauru and +1.79% in Tonga.

Birth rate in Nauru vs Tonga by year

Chart Table

Nauru

Tonga

Annual births per 1,000 people

1x

Year	Annual births per 1,000 people
	Nauru	Tonga
2023	25.5	23.1
2022	26.6	23.4
2021	27.8	23.5
2020	28.7	23.6
2019	29.6	23.8
2018	30.7	24.1
2017	32.2	24.5
2016	33.6	25.2
2015	34.2	25.8
2014	34.7	26.4
2013	35.3	26.9
2012	36.1	27.3
2011	36.8	27.7
2010	36.1	28
2009	34.3	28.4
2008	32.3	28.7
2007	30.4	29
2006	29.1	29.5
2005	28.5	30
2004	28.1	30
2003	27.9	29.9
2002	27.8	29.5
2001	27.9	29.4
2000	28.2	29.4
1999	28.6	29.6
1998	28.7	29.7
1997	29	29.8
1996	29.4	30.6
1995	29.8	31.4
1994	30.3	32.2
1993	31.1	32.7
1992	31.8	33
1991	31.7	33.2
1990	31.7	33.3
1989	31.9	33.4
1988	32	33.5
1987	32	33.7
1986	31.9	34.4
1985	31.9	34.9
1984	31.8	35.4
1983	31.8	35.6
1982	31.8	35.8
1981	31.2	36
1980	29.7	36.1
1979	27.6	36.1
1978	25	36
1977	21.8	35.7
1976	20.1	35.6
1975	18.7	35.8
1974	17.4	36
1973	16.3	36.5
1972	15.6	37
1971	15.2	37.8
1970	15.1	38.8
1969	18.8	39.6
1968	27.2	40.3
1967	28.3	41
1966	29.9	41.4
1965	29.1	41.9
1964	28.2	42.4
1963	27	42.9
1962	25.6	43.4
1961	25.6	43.9
1960	26.9	44.3

The latest reported birth rate per 1,000 people in 2023 was 25.5 in Nauru and 23.1 in Tonga, compared with 26.9 and 44.3, respectively, in 1960.

Children 0-14 years as share of population

Chart Table

Nauru

Factual

UN forecast

Tonga

Factual

UN forecast

1x

Year	Young
	Nauru	Tonga
2100	20.7%	17.5%
2099	20.8%	17.6%
2098	21%	17.7%
2097	21.1%	17.7%
2096	21.2%	17.9%
2095	21.3%	18%
2094	21.4%	18.1%
2093	21.6%	18.3%
2092	21.7%	18.4%
2091	21.9%	18.6%
2090	22%	18.8%
2089	22.2%	19%
2088	22.4%	19.3%
2087	22.5%	19.5%
2086	22.7%	19.7%
2085	22.9%	20%
2084	23.1%	20.2%
2083	23.3%	20.4%
2082	23.4%	20.7%
2081	23.6%	20.9%
2080	23.8%	21.1%
2079	23.9%	21.3%
2078	24.1%	21.5%
2077	24.2%	21.7%
2076	24.3%	21.9%
2075	24.5%	22%
2074	24.6%	22.2%
2073	24.7%	22.3%
2072	24.9%	22.4%
2071	25%	22.6%
2070	25.1%	22.7%
2069	25.3%	22.8%
2068	25.4%	23%
2067	25.6%	23.2%
2066	25.8%	23.4%
2065	26%	23.6%
2064	26.2%	23.8%
2063	26.4%	24.1%
2062	26.7%	24.4%
2061	26.9%	24.7%
2060	27.2%	25%
2059	27.5%	25.4%
2058	27.9%	25.8%
2057	28.2%	26.2%
2056	28.5%	26.6%
2055	28.8%	27%
2054	29.1%	27.4%
2053	29.4%	27.8%
2052	29.7%	28.2%
2051	29.9%	28.5%
2050	30.2%	28.9%
2049	30.4%	29.1%
2048	30.6%	29.4%
2047	30.7%	29.6%
2046	30.8%	29.7%
2045	30.9%	29.8%
2044	30.9%	29.9%
2043	31%	30%
2042	31%	30.1%
2041	31%	30.1%
2040	31%	30.2%
2039	31.1%	30.2%
2038	31.2%	30.3%
2037	31.4%	30.4%
2036	31.8%	30.6%
2035	32%	30.7%
2034	32.3%	30.9%
2033	32.5%	31.1%
2032	32.9%	31.4%
2031	33.4%	31.8%
2030	34%	32.3%
2029	34.7%	33%
2028	35.3%	33.6%
2027	36.1%	34.1%
2026	36.8%	34.6%
2025	37.5%	35.2%
2024	37.8%	35.4%
2023	38.2%	35.6%
2022	38.3%	35.6%
2021	38.3%	35.7%
2020	38%	35.8%
2019	37.6%	36%
2018	37.6%	36.2%
2017	38%	36.4%
2016	38.2%	36.5%
2015	38.2%	36.7%
2014	38.2%	36.9%
2013	38%	37.1%
2012	37.7%	37.2%
2011	37.1%	37.4%
2010	36.3%	37.6%
2009	35.8%	37.8%
2008	35.6%	38%
2007	35.7%	38.3%
2006	36.1%	38.3%
2005	36.6%	38.3%
2004	37.1%	38.2%
2003	37.7%	38.1%
2002	38.2%	38.1%
2001	38.5%	38.2%
2000	38.9%	38.3%
1999	39.4%	38.6%
1998	39.9%	38.9%
1997	40.5%	39.3%
1996	41.1%	39.7%
1995	41.7%	39.9%
1994	42.1%	40.1%
1993	42.5%	40.3%
1992	42.5%	40.5%
1991	42.1%	40.6%
1990	41.2%	40.8%
1989	40.2%	40.9%
1988	39.2%	41.2%
1987	38.3%	41.5%
1986	37.5%	41.7%
1985	36.5%	42%
1984	35.7%	42.4%
1983	34.6%	42.9%
1982	33.2%	43.4%
1981	31.9%	43.9%
1980	30.9%	44.3%
1979	30.6%	44.8%
1978	30.9%	45.3%
1977	31.9%	45.8%
1976	33.4%	46.1%
1975	34.9%	46.2%
1974	36.4%	46.2%
1973	38.1%	46.2%
1972	39.7%	46.3%
1971	41.3%	46.4%
1970	42.9%	46.4%
1969	43.4%	46.3%
1968	41.3%	46.2%
1967	39.5%	46%
1966	39.4%	45.9%
1965	38.6%	45.9%
1964	37.5%	45.9%
1963	36.5%	45.9%
1962	35.7%	45.8%
1961	35.2%	45.7%
1960	34.8%	45.7%

Children aged 0-14 make up 37.8% of the population in Nauru and 35.4% in Tonga in 2024, compared to 41.2% and 40.8% respectively in 1990.

Demographics of Nauru and Tonga compared.

Maternal mortality chart: Nauru vs Tonga

Chart Table

Nauru

Tonga

1x

Year	Maternal mortality per 100K births
	Nauru	Tonga
2023	273	67
2022	317	72
2021	266	76
2020	309	74
2019	267	73
2018	269	74
2017	259	77
2016	248	78
2015	253	79
2014	240	80
2013	247	80
2012	255	83
2011	260	84
2010	297	85
2009	300	91
2008	302	88
2007	303	88
2006	304	89
2005	328	92
2004	324	92
2003	323	95
2002	321	98
2001	299	98
2000	278	100
1999	277	99
1998	257	104
1997	218	111
1996	218	113
1995	219	117
1994	220	123
1993	219	127
1992	217	129
1991	216	134
1990	195	138
1989	198	139
1988	202	145
1987	206	147
1986	209	149
1985	191	148

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 273 deaths per 100,000 live births in Nauru, compared to 67 deaths in Tonga.

Under-five mortality rates

Chart Table

Nauru

Tonga

Probability that a newborn baby will die before reaching age five

1x

Year	Under 5 mortality rate
	Nauru	Tonga
2023	0.89%	0.99%
2022	0.95%	1.02%
2021	1.02%	1.05%
2020	1.11%	1.08%
2019	1.22%	1.1%
2018	1.34%	1.12%
2017	1.47%	1.15%
2016	1.61%	1.17%
2015	1.76%	1.19%
2014	1.93%	1.22%
2013	2.11%	1.24%
2012	2.29%	1.26%
2011	2.48%	1.29%
2010	2.66%	1.31%
2009	2.84%	1.34%
2008	3%	1.37%
2007	3.15%	1.41%
2006	3.29%	1.44%
2005	3.41%	1.48%
2004	3.53%	1.52%
2003	3.66%	1.56%
2002	3.81%	1.61%
2001	3.96%	1.65%
2000	4.13%	1.7%
1999	4.32%	1.74%
1998	4.52%	1.78%
1997	4.74%	1.81%
1996	4.97%	1.85%
1995	5.22%	1.89%
1994	5.49%	1.94%
1993	5.78%	2%
1992	6.09%	2.06%
1991	6.41%	2.14%
1990	6.74%	2.21%
1989	7.08%	2.29%
1988	7.43%	2.37%
1987	7.81%	2.44%
1986	8.2%	2.51%
1985	8.62%	2.57%
1984	-	2.63%
1983	-	2.7%
1982	-	2.78%
1981	-	2.87%
1980	-	2.97%
1979	-	3.09%
1978	-	3.22%
1977	-	3.37%
1976	-	3.53%
1975	-	3.71%
1974	-	3.9%
1973	-	4.11%
1972	-	4.35%
1971	-	4.61%
1970	-	4.91%
1969	-	5.25%
1968	-	5.63%
1967	-	6.03%
1966	-	6.45%
1965	-	6.89%
1964	-	7.35%
1963	-	7.83%

The chance that a newborn baby will die before reaching age five is 0.89% in Nauru and 0.99% in Tonga. Above is a chart with historical data on under-five mortality rates.