Fertility & birth rates in Brunei and Sierra Leone

Fertility rate in Brunei vs Sierra Leone by year

Chart Table

Brunei

Sierra Leone

1x

Year	Fertility rate
	Brunei	Sierra Leone
2023	1.75	3.79
2022	1.76	3.88
2021	1.78	3.98
2020	1.8	4.08
2019	1.82	4.19
2018	1.85	4.29
2017	1.88	4.39
2016	1.92	4.47
2015	1.95	4.55
2014	1.97	4.7
2013	1.98	4.87
2012	1.97	5.06
2011	1.96	5.21
2010	1.94	5.33
2009	1.92	5.45
2008	1.92	5.56
2007	1.93	5.64
2006	1.97	5.74
2005	2.02	5.81
2004	2.1	5.92
2003	2.19	6.09
2002	2.26	6.23
2001	2.34	6.31
2000	2.4	6.36
1999	2.46	6.42
1998	2.53	6.5
1997	2.6	6.53
1996	2.68	6.55
1995	2.79	6.56
1994	2.9	6.56
1993	3.01	6.57
1992	3.11	6.56
1991	3.21	6.55
1990	3.29	6.57
1989	3.36	6.57
1988	3.44	6.59
1987	3.49	6.61
1986	3.55	6.6
1985	3.61	6.59
1984	3.68	6.59
1983	3.75	6.57
1982	3.84	6.56
1981	3.94	6.55
1980	4.07	6.56
1979	4.22	6.58
1978	4.39	6.59
1977	4.58	6.57
1976	4.78	6.55
1975	4.99	6.55
1974	5.18	6.53
1973	5.36	6.47
1972	5.5	6.45
1971	5.62	6.43
1970	5.8	6.41
1969	6.01	6.39
1968	6.2	6.39
1967	6.37	6.38
1966	6.51	6.35
1965	6.65	6.31
1964	6.77	6.29
1963	6.89	6.26
1962	7.03	6.22
1961	7.19	6.21
1960	7.32	6.18

According to the latest available data on birth rates, the fertility rate in Brunei was 1.75 children per woman in 2023, compared to 3.79 in Sierra Leone in 2023. The replacement level is considered to be 2.1 children per woman.

Check Brunei vs Sierra Leone population clock for a dynamic visualization of the changing population.

Natural population change by year

Chart Table

Brunei

Sierra Leone

1x

Year	Natural population change
	Brunei	Sierra Leone
2023	3,837	188,788
2022	3,319	186,625
2021	3,985	183,326
2020	4,188	181,015
2019	4,335	181,068
2018	4,502	178,772
2017	4,685	173,259
2016	4,876	168,784
2015	5,060	162,275
2014	5,206	160,137
2013	5,302	161,265
2012	5,349	160,915
2011	5,242	158,858
2010	5,003	155,338
2009	4,789	152,669
2008	4,624	149,855
2007	4,521	145,740
2006	4,590	144,127
2005	4,703	137,234
2004	4,874	132,661
2003	5,034	130,312
2002	5,169	126,429
2001	5,275	116,647
2000	5,331	110,754
1999	5,388	102,295
1998	5,466	103,906
1997	5,518	105,433
1996	5,606	104,140
1995	5,750	100,885
1994	5,907	101,486
1993	6,045	103,317
1992	6,169	103,251
1991	6,259	105,477
1990	6,265	100,778
1989	6,202	98,298
1988	6,135	96,344
1987	6,017	94,235
1986	5,826	90,902
1985	5,620	88,869
1984	5,373	87,072
1983	5,138	84,628
1982	4,931	82,457
1981	4,839	80,111
1980	4,775	77,932
1979	4,717	75,992
1978	4,668	74,130
1977	4,594	71,663
1976	4,518	69,506
1975	4,431	67,560
1974	4,334	65,357
1973	4,216	62,443
1972	4,085	60,279
1971	3,880	58,484
1970	3,694	56,513
1969	3,618	54,768
1968	3,551	53,126
1967	3,477	51,734
1966	3,403	49,486
1965	3,326	47,223
1964	3,264	45,487
1963	3,195	43,569
1962	3,128	41,603
1961	3,175	40,022
1960	3,168	38,192

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 +0.84% in Brunei and +2.23% in Sierra Leone.

For the past 10 years, the annual natural population change has been +1.01% in Brunei and +2.31% in Sierra Leone.

Birth rate in Brunei vs Sierra Leone by year

Chart Table

Brunei

Sierra Leone

Annual births per 1,000 people

1x

Year	Annual births per 1,000 people
	Brunei	Sierra Leone
2023	13.6	30.6
2022	13.8	31.1
2021	14.1	31.6
2020	14.3	32.2
2019	14.6	32.8
2018	14.9	33.3
2017	15.3	33.8
2016	15.8	34.2
2015	16.2	34.7
2014	16.6	35.6
2013	16.9	36.6
2012	17.1	37.8
2011	17	38.5
2010	16.6	39.1
2009	16.2	39.9
2008	16	40.6
2007	15.9	41.1
2006	16.3	41.8
2005	16.7	42
2004	17.4	42.5
2003	18	43.5
2002	18.7	44.3
2001	19.3	44
2000	19.8	45
1999	20.4	46.1
1998	21	46.3
1997	21.6	46.3
1996	22.4	46.5
1995	23.4	46.8
1994	24.5	46.8
1993	25.6	46.9
1992	26.7	47
1991	27.7	47.5
1990	28.5	45.5
1989	29	46.3
1988	29.5	46.4
1987	29.8	46.6
1986	29.9	46.6
1985	29.9	46.7
1984	29.7	46.8
1983	29.4	46.7
1982	29.3	46.8
1981	29.7	46.8
1980	30.3	46.8
1979	30.9	47
1978	31.6	47.2
1977	32.2	47.1
1976	32.8	47.2
1975	33.4	47.3
1974	34	47.4
1973	34.5	47.2
1972	34.9	47.2
1971	34.6	47.3
1970	34.3	47.4
1969	34.7	47.5
1968	35.6	47.7
1967	36.5	47.9
1966	37.5	48
1965	38.6	48
1964	39.7	48.2
1963	41	48.2
1962	42.8	48.1
1961	45	48.1
1960	47.2	48

The latest reported birth rate per 1,000 people in 2023 was 13.6 in Brunei and 30.6 in Sierra Leone, compared with 47.2 and 48, respectively, in 1960.

Children 0-14 years as share of population

Chart Table

Brunei

Factual

UN forecast

Sierra Leone

Factual

UN forecast

1x

Year	Young
	Brunei	Sierra Leone
2100	13.8%	19%
2099	13.9%	19%
2098	13.9%	19.1%
2097	13.9%	19.2%
2096	14%	19.3%
2095	14%	19.5%
2094	14.1%	19.6%
2093	14.1%	19.7%
2092	14.1%	19.8%
2091	14.1%	19.9%
2090	14.2%	20%
2089	14.2%	20.1%
2088	14.2%	20.3%
2087	14.2%	20.4%
2086	14.2%	20.5%
2085	14.2%	20.7%
2084	14.2%	20.8%
2083	14.2%	20.9%
2082	14.2%	21.1%
2081	14.2%	21.2%
2080	14.2%	21.4%
2079	14.2%	21.6%
2078	14.2%	21.7%
2077	14.2%	21.9%
2076	14.2%	22.1%
2075	14.2%	22.2%
2074	14.3%	22.4%
2073	14.3%	22.6%
2072	14.3%	22.8%
2071	14.4%	23%
2070	14.4%	23.2%
2069	14.5%	23.4%
2068	14.6%	23.6%
2067	14.6%	23.8%
2066	14.7%	24%
2065	14.8%	24.3%
2064	14.8%	24.5%
2063	14.9%	24.7%
2062	15%	25%
2061	15%	25.2%
2060	15.1%	25.5%
2059	15.2%	25.7%
2058	15.2%	26%
2057	15.3%	26.3%
2056	15.3%	26.6%
2055	15.4%	26.9%
2054	15.4%	27.1%
2053	15.4%	27.4%
2052	15.5%	27.7%
2051	15.5%	28.1%
2050	15.6%	28.4%
2049	15.6%	28.7%
2048	15.7%	29%
2047	15.8%	29.3%
2046	15.9%	29.7%
2045	16%	30%
2044	16.1%	30.3%
2043	16.2%	30.7%
2042	16.3%	31.1%
2041	16.5%	31.4%
2040	16.7%	31.8%
2039	16.9%	32.2%
2038	17.1%	32.6%
2037	17.4%	33%
2036	17.6%	33.4%
2035	17.9%	33.8%
2034	18.1%	34.2%
2033	18.4%	34.6%
2032	18.7%	35%
2031	19%	35.4%
2030	19.3%	35.7%
2029	19.6%	36.1%
2028	20%	36.5%
2027	20.3%	37%
2026	20.5%	37.4%
2025	20.7%	37.9%
2024	20.8%	38.1%
2023	21%	38.5%
2022	21.2%	39%
2021	21.3%	39.4%
2020	21.6%	39.8%
2019	21.9%	40.2%
2018	22.3%	40.6%
2017	22.7%	41%
2016	23.1%	41.4%
2015	23.6%	41.8%
2014	24%	42.2%
2013	24.5%	42.5%
2012	24.9%	42.8%
2011	25.2%	43%
2010	25.3%	43.2%
2009	25.4%	43.4%
2008	25.5%	43.5%
2007	25.5%	43.6%
2006	25.9%	43.7%
2005	26.7%	43.8%
2004	27.4%	43.9%
2003	28.1%	43.9%
2002	28.9%	43.9%
2001	29.6%	43.9%
2000	30.3%	43.8%
1999	31%	43.7%
1998	31.6%	43.6%
1997	32.2%	43.5%
1996	32.7%	43.5%
1995	33.3%	43.4%
1994	33.7%	43.3%
1993	34.1%	43.2%
1992	34.3%	43.1%
1991	34.4%	43%
1990	34.4%	42.9%
1989	34.6%	42.9%
1988	34.7%	42.8%
1987	34.9%	42.7%
1986	35.2%	42.6%
1985	35.7%	42.5%
1984	36.3%	42.3%
1983	36.9%	42.2%
1982	37.6%	42.1%
1981	38.1%	42%
1980	38.5%	41.9%
1979	38.9%	41.8%
1978	39.3%	41.7%
1977	39.9%	41.6%
1976	40.6%	41.4%
1975	41.3%	41.3%
1974	42%	41.1%
1973	42.6%	40.9%
1972	43%	40.7%
1971	43.3%	40.6%
1970	43.6%	40.3%
1969	44.2%	40.1%
1968	44.8%	39.9%
1967	45.4%	39.6%
1966	46%	39.4%
1965	46.5%	39.1%
1964	46.6%	38.8%
1963	46.6%	38.5%
1962	46.1%	38.3%
1961	45.2%	38.3%
1960	44.1%	38.2%

Children aged 0-14 make up 20.8% of the population in Brunei and 38.1% in Sierra Leone in 2024, compared to 34.4% and 42.9% respectively in 1990.

Demographics of Brunei and Sierra Leone compared.

Maternal mortality chart: Brunei vs Sierra Leone

Chart Table

Brunei

Sierra Leone

1x

Year	Maternal mortality per 100K births
	Brunei	Sierra Leone
2023	36	354
2022	88	370
2021	44	403
2020	39	422
2019	38	464
2018	39	491
2017	39	578
2016	39	633
2015	39	730
2014	40	821
2013	40	842
2012	40	915
2011	40	967
2010	40	1,018
2009	40	1,054
2008	40	1,093
2007	41	1,132
2006	42	1,168
2005	43	1,294
2004	44	1,366
2003	45	1,433
2002	46	1,492
2001	46	1,518
2000	48	1,603
1999	50	1,731
1998	51	1,753
1997	52	1,721
1996	54	1,726
1995	55	1,777
1994	58	1,755
1993	59	1,696
1992	62	1,681
1991	65	1,699
1990	68	1,572
1989	71	1,575
1988	73	1,549
1987	75	1,533
1986	78	1,530
1985	79	1,506

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 36 deaths per 100,000 live births in Brunei, compared to 354 deaths in Sierra Leone.

Under-five mortality rates

Chart Table

Brunei

Sierra Leone

Probability that a newborn baby will die before reaching age five

1x

Year	Under 5 mortality rate
	Brunei	Sierra Leone
2023	0.94%	9.43%
2022	0.95%	9.77%
2021	0.96%	10.1%
2020	0.97%	10.5%
2019	0.98%	10.9%
2018	0.99%	11.3%
2017	1%	11.8%
2016	1%	12.3%
2015	1%	13.8%
2014	1%	13.7%
2013	0.99%	13.9%
2012	0.99%	14.5%
2011	0.98%	15.2%
2010	0.97%	15.9%
2009	0.96%	16.6%
2008	0.96%	17.3%
2007	0.95%	18.1%
2006	0.95%	18.8%
2005	0.95%	19.4%
2004	0.95%	20.1%
2003	0.96%	20.7%
2002	0.98%	21.3%
2001	1%	21.8%
2000	1.03%	22.4%
1999	1.07%	22.9%
1998	1.1%	23.4%
1997	1.15%	23.9%
1996	1.19%	24.3%
1995	1.23%	24.7%
1994	1.27%	25%
1993	1.3%	25.3%
1992	1.31%	25.5%
1991	1.32%	25.7%
1990	1.33%	25.9%
1989	1.35%	26.2%
1988	1.38%	26.4%
1987	1.42%	26.6%
1986	1.48%	26.9%
1985	1.57%	27.2%
1984	1.67%	27.5%
1983	1.79%	27.8%
1982	1.93%	28.1%
1981	2.09%	28.5%
1980	2.28%	28.9%
1979	2.48%	29.2%
1978	2.71%	29.6%
1977	2.95%	30%
1976	3.21%	30.5%
1975	3.49%	30.9%
1974	3.77%	31.4%
1973	4.06%	31.9%
1972	4.35%	32.3%
1971	4.64%	32.9%
1970	4.91%	33.4%
1969	5.16%	33.9%
1968	5.42%	34.5%
1967	5.69%	35%
1966	5.98%	35.6%
1965	6.32%	36.2%
1964	6.7%	36.8%
1963	7.15%	37.4%
1962	7.66%	38%
1961	8.24%	38.5%
1960	8.9%	39.1%

The chance that a newborn baby will die before reaching age five is 0.94% in Brunei and 9.43% in Sierra Leone. Above is a chart with historical data on under-five mortality rates.