Fertility & birth rates in Guinea-Bissau and Tanzania

Fertility rate in Guinea-Bissau vs Tanzania chart

According to the latest available data on birth rates, the fertility rate in Guinea-Bissau was 3.84 children per woman in 2023, compared to 4.61 in Tanzania in 2023. The replacement level is considered to be 2.1 children per woman.

Check Guinea-Bissau vs Tanzania population clock for a dynamic visualization of the changing population.

The chart below showcases historical changes in the birth rates.

Table

Year	Fertility rate
	Guinea-Bissau	Tanzania
1960	5.92	6.54
1961	5.93	6.56
1962	5.94	6.61
1963	5.95	6.65
1964	5.96	6.68
1965	5.97	6.73
1966	5.98	6.8
1967	5.99	6.86
1968	6.01	6.9
1969	6.02	6.95
1970	6.04	7
1971	6.06	7.04
1972	6.08	7.05
1973	6.1	7.06
1974	6.12	7.12
1975	6.15	7.1
1976	6.19	7.09
1977	6.25	7.07
1978	6.32	7.06
1979	6.4	7.04
1980	6.49	6.99
1981	6.57	6.93
1982	6.64	6.87
1983	6.69	6.81
1984	6.73	6.72
1985	6.74	6.6
1986	6.73	6.49
1987	6.72	6.41
1988	6.69	6.38
1989	6.66	6.3
1990	6.5	6.2
1991	6.47	6.14
1992	6.44	6.08
1993	6.37	6
1994	6.3	5.89
1995	6.22	5.82
1996	6.14	5.83
1997	6.06	5.84
1998	5.97	5.81
1999	5.87	5.75
2000	5.79	5.67
2001	5.69	5.62
2002	5.63	5.57
2003	5.58	5.58
2004	5.5	5.6
2005	5.46	5.58
2006	5.41	5.51
2007	5.37	5.4
2008	5.27	5.32
2009	5.18	5.26
2010	5.11	5.23
2011	5.07	5.14
2012	5	5.14
2013	4.93	5.16
2014	4.79	5.12
2015	4.66	5.03
2016	4.52	5.01
2017	4.35	4.99
2018	4.24	4.93
2019	4.15	4.87
2020	4.08	4.8
2021	4	4.73
2022	3.91	4.67
2023	3.84	4.61
2024	3.76	4.54
2025	3.68	4.47
2026	3.62	4.41
2027	3.56	4.34
2028	3.5	4.28
2029	3.44	4.22
2030	3.37	4.16
2031	3.31	4.11
2032	3.25	4.04
2033	3.2	3.98
2034	3.15	3.94
2035	3.09	3.88
2036	3.04	3.83
2037	3	3.76
2038	2.95	3.72
2039	2.91	3.67
2040	2.87	3.63
2041	2.84	3.57
2042	2.8	3.54
2043	2.77	3.49
2044	2.74	3.46
2045	2.71	3.4
2046	2.67	3.39
2047	2.64	3.35
2048	2.62	3.31
2049	2.59	3.25
2050	2.56	3.23

Children 0-14 years as share of population

Table

Year	Share of people 0-14 years old
	Guinea-Bissau	Tanzania
1960	36.9%	44.9%
1961	37.1%	44.8%
1962	37.7%	44.8%
1963	38.4%	44.8%
1964	39.6%	45%
1965	41%	45.2%
1966	41.9%	45.4%
1967	42.1%	45.6%
1968	41.8%	45.8%
1969	41.9%	45.9%
1970	41.9%	46%
1971	41.9%	46.1%
1972	41.9%	46.1%
1973	41.6%	46.2%
1974	41.4%	46.3%
1975	41.8%	46.4%
1976	42.6%	46.5%
1977	43.7%	46.6%
1978	44.8%	46.7%
1979	45.1%	46.9%
1980	45%	47.2%
1981	45.3%	47.4%
1982	45.5%	47.5%
1983	45.7%	47.6%
1984	45.9%	47.5%
1985	45.9%	47.4%
1986	46%	47.2%
1987	45.9%	46.9%
1988	45.9%	46.7%
1989	45.8%	46.5%
1990	45.7%	46.3%
1991	45.5%	46.2%
1992	45.5%	46%
1993	45.4%	45.5%
1994	45.4%	44.9%
1995	45.3%	44.5%
1996	45.2%	44.7%
1997	45.1%	44.8%
1998	45%	44.7%
1999	44.8%	44.7%
2000	44.7%	44.6%
2001	44.5%	44.5%
2002	44.3%	44.6%
2003	44.2%	44.6%
2004	44%	44.7%
2005	43.9%	44.8%
2006	43.8%	44.9%
2007	43.6%	45%
2008	43.5%	45.1%
2009	43.3%	45.3%
2010	43.2%	45.3%
2011	43%	45.2%
2012	42.8%	45.1%
2013	42.7%	44.9%
2014	42.5%	44.8%
2015	42.2%	44.5%
2016	42%	44.2%
2017	41.7%	44%
2018	41.3%	43.8%
2019	40.9%	43.6%
2020	40.5%	43.4%
2021	40.1%	43.1%
2022	39.7%	42.9%
2023	39.2%	42.7%
2024	38.8%	42.5%
2025	38.3%	42.3%
2026	37.8%	42.1%
2027	37.4%	41.9%
2028	36.9%	41.7%
2029	36.4%	41.4%
2030	36%	41.1%
2031	35.5%	40.9%
2032	35.1%	40.5%
2033	34.8%	40.2%
2034	34.4%	39.8%
2035	34.1%	39.5%
2036	33.7%	39.1%
2037	33.4%	38.8%
2038	33%	38.4%
2039	32.7%	38.1%
2040	32.4%	37.8%
2041	32%	37.5%
2042	31.7%	37.1%
2043	31.4%	36.8%
2044	31%	36.5%
2045	30.7%	36.2%
2046	30.4%	35.9%
2047	30.1%	35.6%
2048	29.7%	35.4%
2049	29.4%	35.1%
2050	29.1%	34.8%

Children aged 0-14 make up 38.8% of the population in Guinea-Bissau and 42.5% in Tanzania in 2024, compared to 45.7% and 46.3% respectively in 1990.

Demographics of Guinea-Bissau and Tanzania compared.

Natural population change in Guinea-Bissau vs Tanzania by year

For the past 10 years, the annual natural population change (excluding migration) has been +2.44% in Guinea-Bissau and +3.05% in Tanzania. 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
	Guinea-Bissau	Tanzania
1960	10,618	275,814
1961	10,756	286,839
1962	10,662	300,663
1963	9,190	314,644
1964	8,989	328,527
1965	7,789	343,456
1966	6,955	360,229
1967	6,742	374,763
1968	7,289	389,467
1969	7,857	408,322
1970	7,632	427,988
1971	8,183	449,014
1972	7,911	467,305
1973	8,430	488,429
1974	10,321	515,152
1975	11,998	533,906
1976	13,688	553,617
1977	15,484	574,938
1978	17,468	595,024
1979	19,736	613,388
1980	21,024	629,444
1981	21,611	645,496
1982	22,131	662,627
1983	22,542	679,720
1984	22,861	687,435
1985	23,116	697,867
1986	23,301	705,677
1987	23,549	718,580
1988	23,940	736,551
1989	24,286	743,854
1990	23,936	750,825
1991	24,527	762,011
1992	25,747	767,961
1993	26,943	778,044
1994	27,895	803,953
1995	29,142	838,980
1996	29,778	868,524
1997	29,792	882,544
1998	30,390	920,806
1999	30,916	948,659
2000	32,816	985,185
2001	33,461	1,026,242
2002	34,561	1,063,195
2003	35,649	1,118,435
2004	36,495	1,175,379
2005	37,347	1,224,165
2006	38,886	1,257,927
2007	40,288	1,278,285
2008	40,841	1,303,728
2009	41,950	1,332,015
2010	43,067	1,363,477
2011	44,405	1,384,886
2012	45,480	1,439,325
2013	46,472	1,509,008
2014	46,615	1,565,630
2015	46,846	1,592,882
2016	46,814	1,659,502
2017	46,318	1,726,909
2018	46,659	1,777,852
2019	47,196	1,816,669
2020	46,718	1,861,377
2021	47,242	1,880,137
2022	48,920	1,927,960
2023	49,498	1,960,623

Maternal mortality chart: Guinea-Bissau vs Tanzania

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 505 deaths per 100,000 live births in Guinea-Bissau, compared to 276 deaths in Tanzania.

Table

Year	Maternal mortality per 100K births
	Guinea-Bissau	Tanzania
1985	1,851	980
1986	1,825	971
1987	1,796	964
1988	1,759	949
1989	1,698	927
1990	1,709	900
1991	1,663	873
1992	1,633	864
1993	1,613	851
1994	1,644	816
1995	1,556	797
1996	1,539	775
1997	1,642	777
1998	1,465	739
1999	1,461	635
2000	1,295	568
2001	1,222	493
2002	1,141	454
2003	1,069	397
2004	980	365
2005	956	350
2006	831	366
2007	792	453
2008	802	511
2009	753	502
2010	698	486
2011	678	475
2012	704	448
2013	707	479
2014	662	454
2015	631	433
2016	617	396
2017	597	345
2018	585	319
2019	598	292
2020	603	160
2021	617	162
2022	539	152
2023	505	276

Under-five mortality rates

The chance that a newborn baby will die before reaching age five is 6.93% in Guinea-Bissau and 3.89% in Tanzania. 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
	Guinea-Bissau	Tanzania
1960	-	24.2%
1961	-	24%
1962	-	23.8%
1963	-	23.6%
1964	-	23.4%
1965	-	23.1%
1966	-	22.8%
1967	-	22.5%
1968	-	22.2%
1969	-	21.9%
1970	-	21.6%
1971	-	21.2%
1972	-	20.9%
1973	-	20.5%
1974	-	20.1%
1975	-	19.6%
1976	-	19.2%
1977	-	18.8%
1978	-	18.4%
1979	-	18.1%
1980	-	17.9%
1981	-	17.8%
1982	-	17.8%
1983	-	17.8%
1984	-	17.8%
1985	24.4%	17.7%
1986	24%	17.6%
1987	23.5%	17.4%
1988	23.1%	17.2%
1989	22.7%	16.9%
1990	22.2%	16.7%
1991	21.8%	16.5%
1992	21.3%	16.3%
1993	20.9%	16.1%
1994	20.4%	15.9%
1995	19.9%	15.6%
1996	19.4%	15.2%
1997	18.9%	14.8%
1998	18.4%	14.2%
1999	17.9%	13.6%
2000	17.4%	12.8%
2001	16.8%	12.1%
2002	16.3%	11.3%
2003	15.7%	10.5%
2004	15.1%	9.86%
2005	14.5%	9.24%
2006	13.9%	8.69%
2007	13.2%	8.16%
2008	12.6%	7.7%
2009	12%	7.24%
2010	11.4%	6.86%
2011	10.9%	6.5%
2012	10.4%	6.21%
2013	9.93%	5.95%
2014	9.53%	5.67%
2015	9.18%	5.48%
2016	8.84%	5.25%
2017	8.53%	5.02%
2018	8.21%	4.8%
2019	7.91%	4.6%
2020	7.66%	4.42%
2021	7.41%	4.22%
2022	7.16%	4.05%
2023	6.93%	3.89%