Fertility & birth rates in Bulgaria and Nigeria

Fertility rate in Bulgaria vs Nigeria by year

Chart Table

Bulgaria

Nigeria

1x

Year	Fertility rate
	Bulgaria	Nigeria
2023	1.81	4.48
2022	1.78	4.55
2021	1.8	4.64
2020	1.77	4.7
2019	1.79	4.86
2018	1.73	5.02
2017	1.71	5.18
2016	1.67	5.34
2015	1.64	5.5
2014	1.62	5.62
2013	1.54	5.69
2012	1.5	5.8
2011	1.51	5.89
2010	1.57	5.95
2009	1.66	5.99
2008	1.56	6.02
2007	1.49	6.03
2006	1.44	6.05
2005	1.37	6.06
2004	1.33	6.09
2003	1.26	6.1
2002	1.23	6.12
2001	1.21	6.13
2000	1.26	6.12
1999	1.23	6.08
1998	1.11	6.07
1997	1.09	6.14
1996	1.23	6.22
1995	1.23	6.27
1994	1.37	6.32
1993	1.46	6.35
1992	1.55	6.39
1991	1.66	6.43
1990	1.82	6.46
1989	1.9	6.49
1988	1.97	6.5
1987	1.96	6.5
1986	2.02	6.56
1985	1.97	6.62
1984	2.01	6.7
1983	2.01	6.78
1982	2.01	6.8
1981	2	6.82
1980	2.05	6.85
1979	2.16	6.89
1978	2.15	6.92
1977	2.21	6.86
1976	2.24	6.81
1975	2.23	6.77
1974	2.29	6.7
1973	2.15	6.63
1972	2.03	6.58
1971	2.1	6.53
1970	2.17	6.47
1969	2.27	6.44
1968	2.27	6.42
1967	2.02	6.4
1966	2.03	6.39
1965	2.09	6.37
1964	2.19	6.36
1963	2.21	6.35
1962	2.24	6.36
1961	2.29	6.35
1960	2.31	6.36

According to the latest available data on birth rates, the fertility rate in Bulgaria was 1.81 children per woman in 2023, compared to 4.48 in Nigeria in 2023. The replacement level is considered to be 2.1 children per woman.

Check Bulgaria vs Nigeria population clock for a dynamic visualization of the changing population.

Natural population change by year

Chart Table

Bulgaria

Nigeria

1x

Year	Natural population change
	Bulgaria	Nigeria
2023	-43,837	4,834,309
2022	-62,065	4,739,502
2021	-90,452	4,641,562
2020	-65,507	4,525,164
2019	-46,317	4,609,941
2018	-46,304	4,659,898
2017	-45,583	4,706,183
2016	-42,744	4,761,594
2015	-44,699	4,823,045
2014	-41,027	4,862,319
2013	-37,948	4,811,751
2012	-40,183	4,774,508
2011	-37,477	4,728,363
2010	-34,759	4,629,173
2009	-26,800	4,528,149
2008	-32,967	4,412,976
2007	-37,727	4,265,428
2006	-39,526	4,135,703
2005	-42,124	4,013,788
2004	-40,128	3,877,376
2003	-44,319	3,751,120
2002	-46,240	3,606,814
2001	-44,050	3,478,370
2000	-41,668	3,343,196
1999	-39,411	3,155,425
1998	-52,844	3,003,946
1997	-58,185	2,936,500
1996	-45,159	2,882,205
1995	-42,030	2,830,771
1994	-32,086	2,735,198
1993	-24,569	2,673,675
1992	-18,789	2,596,173
1991	-14,675	2,527,807
1990	-3,487	2,491,928
1989	5,326	2,452,324
1988	9,879	2,376,419
1987	8,971	2,322,397
1986	16,125	2,295,003
1985	11,649	2,289,784
1984	20,610	2,278,060
1983	21,455	2,292,089
1982	24,077	2,233,401
1981	29,341	2,179,884
1980	30,129	2,121,618
1979	40,599	2,074,807
1978	44,070	2,019,621
1977	47,543	1,923,917
1976	56,055	1,827,289
1975	54,941	1,718,623
1974	64,223	1,624,813
1973	57,760	1,525,485
1972	47,169	1,448,928
1971	52,925	1,373,896
1970	61,125	1,295,507
1969	63,256	1,213,484
1968	69,468	1,168,254
1967	49,861	1,082,884
1966	54,504	1,095,582
1965	58,249	1,061,840
1964	66,783	1,028,272
1963	66,241	995,116
1962	64,104	966,452
1961	75,460	932,111
1960	76,314	901,301

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 -0.68% in Bulgaria and +2.12% in Nigeria.

For the past 10 years, the annual natural population change has been -0.79% in Bulgaria and +2.29% in Nigeria.

Birth rate in Bulgaria vs Nigeria by year

Chart Table

Bulgaria

Nigeria

Annual births per 1,000 people

1x

Year	Annual births per 1,000 people
	Bulgaria	Nigeria
2023	8.9	33
2022	8.8	33.2
2021	9	33.5
2020	9	33.7
2019	9.3	34.7
2018	9.3	35.7
2017	9.4	36.7
2016	9.4	37.8
2015	9.4	39
2014	9.6	39.9
2013	9.3	40.4
2012	9.5	41.1
2011	9.6	41.8
2010	10.2	42.1
2009	10.9	42.5
2008	10.4	42.8
2007	10	42.9
2006	9.7	43.2
2005	9.3	43.4
2004	9.1	43.5
2003	8.7	43.7
2002	8.5	43.8
2001	8.5	43.9
2000	9	43.9
1999	8.8	43.4
1998	7.9	43.2
1997	7.7	43.5
1996	8.6	43.9
1995	8.6	44.1
1994	9.4	44
1993	10	44.1
1992	10.4	44.2
1991	11.1	44.3
1990	12.1	44.5
1989	12.6	44.8
1988	13.1	44.7
1987	13	44.8
1986	13.4	45.3
1985	13.3	45.9
1984	13.6	46.5
1983	13.8	47.5
1982	13.9	47.5
1981	14	47.9
1980	14.5	48.3
1979	15.3	48.8
1978	15.5	49.3
1977	16.1	49.1
1976	16.5	49
1975	16.6	49
1974	17.2	48.7
1973	16.2	48.2
1972	15.3	48
1971	15.9	47.8
1970	16.3	47.4
1969	17	47.3
1968	16.9	47.2
1967	15	47.1
1966	14.9	47
1965	15.3	46.9
1964	16.1	46.9
1963	16.4	46.8
1962	16.7	46.7
1961	17.4	46.6
1960	17.8	46.5

The latest reported birth rate per 1,000 people in 2023 was 8.9 in Bulgaria and 33 in Nigeria, compared with 17.8 and 46.5, respectively, in 1960.

Children 0-14 years as share of population

Chart Table

Bulgaria

Factual

UN forecast

Nigeria

Factual

UN forecast

1x

Year	Young
	Bulgaria	Nigeria
2100	13%	20.4%
2099	13.1%	20.5%
2098	13.1%	20.6%
2097	13.1%	20.7%
2096	13.2%	20.8%
2095	13.2%	20.9%
2094	13.3%	21%
2093	13.4%	21.1%
2092	13.4%	21.2%
2091	13.4%	21.4%
2090	13.5%	21.5%
2089	13.5%	21.6%
2088	13.6%	21.8%
2087	13.6%	21.9%
2086	13.6%	22.1%
2085	13.6%	22.2%
2084	13.6%	22.4%
2083	13.6%	22.6%
2082	13.6%	22.7%
2081	13.6%	22.9%
2080	13.6%	23.1%
2079	13.6%	23.3%
2078	13.6%	23.5%
2077	13.6%	23.7%
2076	13.6%	23.9%
2075	13.5%	24.1%
2074	13.5%	24.3%
2073	13.5%	24.5%
2072	13.5%	24.7%
2071	13.5%	25%
2070	13.5%	25.2%
2069	13.6%	25.4%
2068	13.6%	25.7%
2067	13.6%	25.9%
2066	13.6%	26.1%
2065	13.6%	26.4%
2064	13.7%	26.6%
2063	13.7%	26.9%
2062	13.7%	27.2%
2061	13.8%	27.4%
2060	13.8%	27.7%
2059	13.8%	28%
2058	13.9%	28.3%
2057	13.9%	28.6%
2056	13.9%	29%
2055	13.9%	29.3%
2054	13.9%	29.6%
2053	13.9%	30%
2052	13.9%	30.3%
2051	13.8%	30.7%
2050	13.8%	31.1%
2049	13.8%	31.5%
2048	13.7%	31.8%
2047	13.7%	32.2%
2046	13.6%	32.6%
2045	13.6%	32.9%
2044	13.6%	33.3%
2043	13.6%	33.7%
2042	13.6%	34%
2041	13.6%	34.4%
2040	13.6%	34.7%
2039	13.6%	35%
2038	13.7%	35.4%
2037	13.7%	35.7%
2036	13.7%	36%
2035	13.7%	36.3%
2034	13.8%	36.6%
2033	13.8%	37%
2032	13.9%	37.4%
2031	14%	37.8%
2030	14.1%	38.3%
2029	14.2%	38.8%
2028	14.2%	39.3%
2027	14.3%	39.8%
2026	14.4%	40.3%
2025	14.4%	40.8%
2024	14.5%	41%
2023	14.5%	41.5%
2022	14.5%	42%
2021	14.5%	42.4%
2020	14.4%	42.8%
2019	14.4%	43.2%
2018	14.3%	43.6%
2017	14.2%	43.9%
2016	14%	44.1%
2015	13.9%	44.3%
2014	13.8%	44.4%
2013	13.7%	44.5%
2012	13.6%	44.5%
2011	13.5%	44.5%
2010	13.5%	44.4%
2009	13.4%	44.4%
2008	13.3%	44.3%
2007	13.4%	44.2%
2006	13.5%	44.1%
2005	13.7%	44%
2004	14%	43.9%
2003	14.4%	43.8%
2002	14.8%	43.8%
2001	15.2%	43.7%
2000	15.7%	43.7%
1999	16.1%	43.8%
1998	16.5%	43.9%
1997	17%	44.1%
1996	17.4%	44.2%
1995	17.9%	44.4%
1994	18.3%	44.6%
1993	18.8%	44.8%
1992	19.3%	45%
1991	19.8%	45.2%
1990	20.3%	45.3%
1989	20.8%	45.5%
1988	21.1%	45.5%
1987	21.3%	45.6%
1986	21.4%	45.6%
1985	21.6%	45.5%
1984	21.8%	45.4%
1983	22%	45.2%
1982	22.1%	45%
1981	22.1%	44.8%
1980	22.1%	44.6%
1979	22.1%	44.4%
1978	22.2%	44.2%
1977	22.2%	43.9%
1976	22.3%	43.7%
1975	22.3%	43.4%
1974	22.2%	43.2%
1973	22.3%	43%
1972	22.4%	42.8%
1971	22.6%	42.5%
1970	22.8%	42.4%
1969	23%	42.2%
1968	23.2%	42%
1967	23.4%	41.8%
1966	23.8%	41.7%
1965	24.2%	41.5%
1964	24.7%	41.4%
1963	25.1%	41.2%
1962	25.4%	41.1%
1961	25.8%	41.1%
1960	26.1%	41.1%

Children aged 0-14 make up 14.5% of the population in Bulgaria and 41% in Nigeria in 2024, compared to 20.3% and 45.3% respectively in 1990.

Demographics of Bulgaria and Nigeria compared.

Maternal mortality chart: Bulgaria vs Nigeria

Chart Table

Bulgaria

Nigeria

1x

Year	Maternal mortality per 100K births
	Bulgaria	Nigeria
2023	6	993
2022	10	1,016
2021	9	1,046
2020	9	1,065
2019	6	1,091
2018	7	1,118
2017	7	1,142
2016	7	1,155
2015	7	1,168
2014	7	1,155
2013	7	1,146
2012	7	1,124
2011	8	1,108
2010	9	1,094
2009	9	1,088
2008	10	1,081
2007	11	1,063
2006	12	1,067
2005	13	1,060
2004	14	1,075
2003	14	1,090
2002	15	1,117
2001	17	1,130
2000	19	1,136
1999	20	1,165
1998	20	1,189
1997	23	1,184
1996	22	1,185
1995	23	1,186
1994	25	1,193
1993	23	1,200
1992	25	1,246
1991	25	1,282
1990	27	1,285
1989	25	1,304
1988	26	1,332
1987	25	1,351
1986	25	1,363
1985	26	1,344

The maternal mortality rate, which is the probability of dying during childbirth or within 42 days of pregnancy termination, is 6 deaths per 100,000 live births in Bulgaria, compared to 993 deaths in Nigeria.

Under-five mortality rates

Chart Table

Bulgaria

Nigeria

Probability that a newborn baby will die before reaching age five

1x

Year	Under 5 mortality rate
	Bulgaria	Nigeria
2023	0.61%	10.5%
2022	0.62%	10.8%
2021	0.63%	11.1%
2020	0.65%	11.4%
2019	0.67%	11.8%
2018	0.7%	12%
2017	0.73%	12.3%
2016	0.77%	12.5%
2015	0.82%	12.6%
2014	0.87%	12.8%
2013	0.93%	12.9%
2012	0.99%	13.1%
2011	1.04%	13.3%
2010	1.08%	13.5%
2009	1.12%	13.8%
2008	1.14%	14.1%
2007	1.18%	14.5%
2006	1.24%	15%
2005	1.33%	15.5%
2004	1.42%	16%
2003	1.51%	16.5%
2002	1.6%	17.1%
2001	1.68%	17.7%
2000	1.75%	18.2%
1999	1.82%	18.8%
1998	1.89%	19.3%
1997	1.93%	19.7%
1996	1.94%	20.1%
1995	1.92%	20.4%
1994	1.91%	20.6%
1993	1.92%	20.7%
1992	1.92%	20.8%
1991	1.89%	20.9%
1990	1.83%	21%
1989	1.79%	21%
1988	1.78%	21%
1987	1.8%	20.9%
1986	1.87%	20.9%
1985	1.97%	20.8%
1984	2.07%	20.7%
1983	2.15%	20.7%
1982	2.22%	20.8%
1981	2.3%	21%
1980	2.38%	21.3%
1979	2.49%	21.8%
1978	2.6%	22.3%
1977	2.72%	22.9%
1976	2.8%	23.6%
1975	2.86%	24.4%
1974	2.91%	25.2%
1973	2.95%	26.1%
1972	3.01%	26.9%
1971	3.11%	27.7%
1970	3.25%	28.5%
1969	3.4%	29.3%
1968	3.54%	30%
1967	3.64%	30.7%
1966	3.7%	31.3%
1965	3.75%	32%
1964	3.86%	32.7%
1963	4.08%	-
1962	4.43%	-
1961	4.89%	-
1960	5.47%	-

The chance that a newborn baby will die before reaching age five is 0.61% in Bulgaria and 10.5% in Nigeria. Above is a chart with historical data on under-five mortality rates.