Fertility & birth rates in Tanzania and Tonga

Fertility rate in Tanzania vs Tonga chart

According to the latest available data on birth rates, the fertility rate in Tanzania was 4.61 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 Tanzania 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
	Tanzania	Tonga
1960	6.54	6.65
1961	6.56	6.61
1962	6.61	6.57
1963	6.65	6.52
1964	6.68	6.46
1965	6.73	6.41
1966	6.8	6.35
1967	6.86	6.29
1968	6.9	6.23
1969	6.95	6.17
1970	7	6.07
1971	7.04	5.96
1972	7.05	5.86
1973	7.06	5.8
1974	7.12	5.77
1975	7.1	5.75
1976	7.09	5.73
1977	7.07	5.7
1978	7.06	5.68
1979	7.04	5.65
1980	6.99	5.6
1981	6.93	5.55
1982	6.87	5.5
1983	6.81	5.45
1984	6.72	5.41
1985	6.6	5.34
1986	6.49	5.27
1987	6.41	5.19
1988	6.38	5.1
1989	6.3	5.01
1990	6.2	4.93
1991	6.14	4.85
1992	6.08	4.79
1993	6	4.73
1994	5.89	4.66
1995	5.82	4.56
1996	5.83	4.46
1997	5.84	4.38
1998	5.81	4.31
1999	5.75	4.23
2000	5.67	4.16
2001	5.62	4.13
2002	5.57	4.14
2003	5.58	4.18
2004	5.6	4.19
2005	5.58	4.2
2006	5.51	4.14
2007	5.4	4.09
2008	5.32	4.01
2009	5.26	3.95
2010	5.23	3.88
2011	5.14	3.83
2012	5.14	3.77
2013	5.16	3.7
2014	5.12	3.62
2015	5.03	3.54
2016	5.01	3.46
2017	4.99	3.39
2018	4.93	3.33
2019	4.87	3.27
2020	4.8	3.23
2021	4.73	3.2
2022	4.67	3.17
2023	4.61	3.13
2024	4.54	3.1
2025	4.47	3.07
2026	4.41	3.04
2027	4.34	3
2028	4.28	2.97
2029	4.22	2.95
2030	4.16	2.91
2031	4.11	2.89
2032	4.04	2.85
2033	3.98	2.82
2034	3.94	2.8
2035	3.88	2.77
2036	3.83	2.75
2037	3.76	2.72
2038	3.72	2.7
2039	3.67	2.68
2040	3.63	2.65
2041	3.57	2.63
2042	3.54	2.61
2043	3.49	2.59
2044	3.46	2.56
2045	3.4	2.54
2046	3.39	2.52
2047	3.35	2.5
2048	3.31	2.49
2049	3.25	2.47
2050	3.23	2.45

Children 0-14 years as share of population

Table

Year	Share of people 0-14 years old
	Tanzania	Tonga
1960	44.9%	45.7%
1961	44.8%	45.7%
1962	44.8%	45.8%
1963	44.8%	45.9%
1964	45%	45.9%
1965	45.2%	45.9%
1966	45.4%	45.9%
1967	45.6%	46%
1968	45.8%	46.2%
1969	45.9%	46.3%
1970	46%	46.4%
1971	46.1%	46.4%
1972	46.1%	46.3%
1973	46.2%	46.2%
1974	46.3%	46.2%
1975	46.4%	46.2%
1976	46.5%	46.1%
1977	46.6%	45.8%
1978	46.7%	45.3%
1979	46.9%	44.8%
1980	47.2%	44.3%
1981	47.4%	43.9%
1982	47.5%	43.4%
1983	47.6%	42.9%
1984	47.5%	42.4%
1985	47.4%	42%
1986	47.2%	41.7%
1987	46.9%	41.5%
1988	46.7%	41.2%
1989	46.5%	40.9%
1990	46.3%	40.8%
1991	46.2%	40.6%
1992	46%	40.5%
1993	45.5%	40.3%
1994	44.9%	40.1%
1995	44.5%	39.9%
1996	44.7%	39.7%
1997	44.8%	39.3%
1998	44.7%	38.9%
1999	44.7%	38.6%
2000	44.6%	38.3%
2001	44.5%	38.2%
2002	44.6%	38.1%
2003	44.6%	38.1%
2004	44.7%	38.2%
2005	44.8%	38.3%
2006	44.9%	38.3%
2007	45%	38.3%
2008	45.1%	38%
2009	45.3%	37.8%
2010	45.3%	37.6%
2011	45.2%	37.4%
2012	45.1%	37.2%
2013	44.9%	37.1%
2014	44.8%	36.9%
2015	44.5%	36.7%
2016	44.2%	36.5%
2017	44%	36.4%
2018	43.8%	36.2%
2019	43.6%	36%
2020	43.4%	35.8%
2021	43.1%	35.7%
2022	42.9%	35.6%
2023	42.7%	35.6%
2024	42.5%	35.4%
2025	42.3%	34.9%
2026	42.1%	34.4%
2027	41.9%	33.8%
2028	41.7%	33.3%
2029	41.4%	32.6%
2030	41.1%	32%
2031	40.9%	31.6%
2032	40.5%	31.2%
2033	40.2%	31%
2034	39.8%	30.8%
2035	39.5%	30.7%
2036	39.1%	30.5%
2037	38.8%	30.4%
2038	38.4%	30.3%
2039	38.1%	30.2%
2040	37.8%	30.1%
2041	37.5%	30.1%
2042	37.1%	30%
2043	36.8%	30%
2044	36.5%	29.9%
2045	36.2%	29.8%
2046	35.9%	29.6%
2047	35.6%	29.5%
2048	35.4%	29.2%
2049	35.1%	29%
2050	34.8%	28.7%

Children aged 0-14 make up 42.5% of the population in Tanzania and 35.4% in Tonga in 2024, compared to 46.3% and 40.8% respectively in 1990.

Demographics of Tanzania and Tonga compared.

Natural population change in Tanzania vs Tonga by year

For the past 10 years, the annual natural population change (excluding migration) has been +3.05% in Tanzania 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
	Tanzania	Tonga
1960	275,814	2,230
1961	286,839	2,284
1962	300,663	2,343
1963	314,644	2,394
1964	328,527	2,445
1965	343,456	2,498
1966	360,229	2,550
1967	374,763	2,603
1968	389,467	2,614
1969	408,322	2,632
1970	427,988	2,628
1971	449,014	2,611
1972	467,305	2,605
1973	488,429	2,617
1974	515,152	2,650
1975	533,906	2,709
1976	553,617	2,769
1977	574,938	2,822
1978	595,024	2,862
1979	613,388	2,884
1980	629,444	2,885
1981	645,496	2,882
1982	662,627	2,853
1983	679,720	2,840
1984	687,435	2,814
1985	697,867	2,762
1986	705,677	2,704
1987	718,580	2,646
1988	736,551	2,649
1989	743,854	2,644
1990	750,825	2,641
1991	762,011	2,637
1992	767,961	2,622
1993	778,044	2,594
1994	803,953	2,547
1995	838,980	2,476
1996	868,524	2,393
1997	882,544	2,332
1998	920,806	2,344
1999	948,659	2,352
2000	985,185	2,346
2001	1,026,242	2,358
2002	1,063,195	2,396
2003	1,118,435	2,448
2004	1,175,379	2,478
2005	1,224,165	2,495
2006	1,257,927	2,459
2007	1,278,285	2,423
2008	1,303,728	2,397
2009	1,332,015	2,358
2010	1,363,477	2,332
2011	1,384,886	2,298
2012	1,439,325	2,255
2013	1,509,008	2,199
2014	1,565,630	2,135
2015	1,592,882	2,064
2016	1,659,502	1,989
2017	1,726,909	1,912
2018	1,777,852	1,873
2019	1,816,669	1,841
2020	1,861,377	1,816
2021	1,880,137	1,773
2022	1,927,960	1,772
2023	1,960,623	1,744

Maternal mortality chart: Tanzania vs Tonga

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 276 deaths per 100,000 live births in Tanzania, compared to 67 deaths in Tonga.

Table

Year	Maternal mortality per 100K births
	Tanzania	Tonga
1985	980	148
1986	971	149
1987	964	147
1988	949	145
1989	927	139
1990	900	138
1991	873	134
1992	864	129
1993	851	127
1994	816	123
1995	797	117
1996	775	113
1997	777	111
1998	739	104
1999	635	99
2000	568	100
2001	493	98
2002	454	98
2003	397	95
2004	365	92
2005	350	92
2006	366	89
2007	453	88
2008	511	88
2009	502	91
2010	486	85
2011	475	84
2012	448	83
2013	479	80
2014	454	80
2015	433	79
2016	396	78
2017	345	77
2018	319	74
2019	292	73
2020	160	74
2021	162	76
2022	152	72
2023	276	67

Under-five mortality rates

The chance that a newborn baby will die before reaching age five is 3.89% in Tanzania 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
	Tanzania	Tonga
1960	24.2%	-
1961	24%	-
1962	23.8%	-
1963	23.6%	7.83%
1964	23.4%	7.35%
1965	23.1%	6.89%
1966	22.8%	6.45%
1967	22.5%	6.03%
1968	22.2%	5.63%
1969	21.9%	5.25%
1970	21.6%	4.91%
1971	21.2%	4.61%
1972	20.9%	4.35%
1973	20.5%	4.11%
1974	20.1%	3.9%
1975	19.6%	3.71%
1976	19.2%	3.53%
1977	18.8%	3.37%
1978	18.4%	3.22%
1979	18.1%	3.09%
1980	17.9%	2.97%
1981	17.8%	2.87%
1982	17.8%	2.78%
1983	17.8%	2.7%
1984	17.8%	2.63%
1985	17.7%	2.57%
1986	17.6%	2.51%
1987	17.4%	2.44%
1988	17.2%	2.37%
1989	16.9%	2.29%
1990	16.7%	2.21%
1991	16.5%	2.14%
1992	16.3%	2.06%
1993	16.1%	2%
1994	15.9%	1.94%
1995	15.6%	1.89%
1996	15.2%	1.85%
1997	14.8%	1.81%
1998	14.2%	1.78%
1999	13.6%	1.74%
2000	12.8%	1.7%
2001	12.1%	1.65%
2002	11.3%	1.61%
2003	10.5%	1.56%
2004	9.86%	1.52%
2005	9.24%	1.48%
2006	8.69%	1.44%
2007	8.16%	1.41%
2008	7.7%	1.37%
2009	7.24%	1.34%
2010	6.86%	1.31%
2011	6.5%	1.29%
2012	6.21%	1.26%
2013	5.95%	1.24%
2014	5.67%	1.22%
2015	5.48%	1.19%
2016	5.25%	1.17%
2017	5.02%	1.15%
2018	4.8%	1.12%
2019	4.6%	1.1%
2020	4.42%	1.08%
2021	4.22%	1.05%
2022	4.05%	1.02%
2023	3.89%	0.99%