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Number of children distributed, by age and cohort. Per cent¹²
Sex	Cohort of births	Number of children					Average number of children
Sex	Cohort of births	0	1	2	3	4 children or more	Average number of children
¹For the cohorts 1935 to 1950 - women residenting in Norway per 31.12. 1998. For the cohort 1955 - women residenting in Norway per 31.12. 2001. For the cohorts 1960 - women residenting in Norway per 31.12. 2005. For the cohorts 1965 - women residenting in Norway per 31.12. 2016. For the cohorts 1970 to 1996 - women residenting in Norway per 31.12.2016.
²For the cohorts 1940 to 1950 - men residenting in Norway per 31.12. 2004. For the cohort 1955 - men residenting in Norway per 31.12. 2005. For the cohort 1960 - men residenting in Norway per 31.12. 2010. For the cohort 1965 - men residenting in Norway per 31.12. 2015. For the cohorts 1968 to 1998 - men residenting in Norway per 31.12.2018.
Age of woman 20 years
	1 935	82.6	14.9	2.4	0.1	0.0	0.20
	1 940	79.6	16.9	3.2	0.3	0.0	0.24
	1 945	78.4	17.2	4.1	0.3	0.0	0.26
	1 950	76.7	19.0	4.0	0.3	0.0	0.28
	1 955	77.4	19.7	2.8	0.1	0.0	0.26
	1 960	84.2	14.2	1.6	0.1	0.0	0.18
	1 965	88.5	10.3	1.1	0.1	0.0	0.13
	1 970	89.7	9.3	0.9	0.1	0.0	0.11
	1 975	91.5	7.6	0.8	0.1	0.0	0.10
	1 980	92.1	7.1	0.8	0.1	0.0	0.09
	1 985	93.9	5.4	0.6	0.1	0.0	0.07
	1 990	94.2	5.3	0.5	0.0	0.0	0.06
	1 995	96.4	3.2	0.3	0.0	0.0	0.04
	1 998	97.8	2.0	0.2	0.0	0.0	0.02

Age of woman 25 years
	1 935	36.9	31.2	24.2	6.4	1.3	1.04
	1 940	34.8	28.5	26.4	8.1	2.2	1.14
	1 945	33.3	29.4	27.3	8.2	1.8	1.16
	1 950	34.4	32.0	27.4	5.4	0.7	1.06
	1 955	43.2	30.6	22.7	3.2	0.4	0.87
	1 960	52.6	27.5	17.1	2.5	0.3	0.71
	1 965	56.8	26.6	13.9	2.3	0.3	0.63
	1 970	61.9	24.1	11.8	1.9	0.3	0.55
	1 975	67.9	20.8	9.3	1.7	0.3	0.46
	1 980	71.3	18.9	8.1	1.4	0.3	0.41
	1 985	72.4	18.4	7.7	1.2	0.3	0.39
	1 990	76.5	15.8	738.0	0.9	0.2	0.33
	1 993	80.8	13.0	5.3	0.8	0.1	0.26

Age of woman 30 years
	1 935	16.9	18.5	35.5	20.2	8.9	1.86
	1 940	15.8	16.8	36.0	22.0	9.3	1.92
	1 945	15.2	18.4	41.3	19.1	5.9	1.82
	1 950	16.9	21.1	44.8	14.3	2.9	1.65
	1 955	22.4	23.9	39.4	12.1	2.3	1.48
	1 960	26.2	25.1	34.8	11.7	2.3	1.39
	1 965	29.4	25.7	32.1	10.6	2.1	1.31
	1 970	33.8	26.2	29.1	9.0	1.9	1.19
	1 975	39.1	26.3	25.7	7.2	1.7	1.06
	1 980	41.0	26.8	23.9	6.6	1.6	1.02
	1 985	43.5	25.8	23.2	6.1	1.5	0.97
	1 988	46.4	24.4	22.4	5.7	1.3	0.91

Age of woman 35 years
	1 935	11.2	11.9	32.0	26.8	18.1	2.29
	1 940	11.0	11.3	34.2	28.0	15.4	2.26
	1 945	10.6	12.8	42.2	25.2	9.1	2.09
	1 950	11.6	15.0	45.8	21.5	6.0	1.95
	1 955	14.5	16.6	42.6	21.0	5.4	1.86
	1 960	15.9	16.7	39.3	22.0	6.1	1.87
	1 965	17.3	17.5	39.0	20.5	5.6	1.82
	1 970	19.6	18.8	38.7	18.3	4.8	1.72
	1 975	21.4	19.5	38.0	16.6	4.5	1.65
	1 980	22.4	20.3	38.1	15.3	4.0	1.60
	1 983	23.6	20.5	37.9	14.5	3.6	1.55

Age of woman 40 years
	1 935	9.8	10.5	30.4	27.4	21.8	2.41
	1 940	9.7	10.1	33.9	29.0	17.3	2.34
	1 945	9.2	11.9	41.6	26.3	11.0	2.18
	1 950	9.7	13.5	45.4	23.3	8.0	2.06
	1 955	11.7	14.6	42.1	23.9	7.7	2.01
	1 960	12.6	14.2	39.2	25.3	8.8	2.07
	1 965	13.3	14.4	40.0	24.3	7.9	2.02
	1 970	14.3	15.2	40.9	22.6	7.2	1.96
	1 975	15.1	15.7	41.2	21.4	6.5	1.91
	1 978	15.7	16.4	41.0	20.7	6.3	1.88

Age of woman 45 years	1 935	9.6	10.4	30.4	27.4	22.2	2.42
	1 940	9.5	10.1	33.7	29.1	17.6	2.35
	1 945	9.0	11.8	41.5	26.4	11.3	2.19
	1 950	9.4	13.3	45.4	23.5	8.4	2.08
	1 955	11.2	14.3	42.1	24.2	8.1	2.04
	1 960	11.9	13.8	39.4	25.6	9.2	2.10
	1 965	12.5	14.2	40.2	24.7	8.4	2.06
	1 970	13.4	14.7	41.2	23.1	7.6	2.00
	1 973	13.3	15.4	42.0	22.2	7.2	1.98

Age of man 20 years	1 940	95.3	4.3	0.4	0.0	0.0	0.05
	1 945	94.1	5.3	0.6	0.0	0.0	0.07
	1 950	93.5	5.8	0.6	0.0	0.0	0.07
	1 955	94.0	5.8	0.3	0.0	0.0	0.06
	1 960	96.9	3.0	0.1	0.0	0.0	0.03
	1 965	97.6	2.4	0.1	0.0	0.0	0.03
	1 970	97.6	2.3	0.1	0.0	0.0	0.03
	1 975	98.2	1.7	0.1	0.0	0.0	0.01
	1 980	98.2	1.7	0.1	0.0	0.0	0.02
	1 985	98.7	1.3	0.1	0.0	0.0	0.01
	1 990	98.5	1.5	0.1	0.0	0.0	0.02
	1 995	99.0	1.0	0.1	0.0	0.0	0.01
	1 998	99.5	0.5	0.0	0.0	0.0	0.01

Age of man 25 years	1 940	60.2	23.8	12.7	2.9	0.4	0.60
	1 945	55.5	26.3	14.7	3.1	0.4	0.67
	1 950	57.7	27.2	13.2	1.7	0.2	0.59
	1 955	66.7	23.1	9.4	0.7	0.1	0.44
	1 960	75.9	17.6	6.0	0.5	0.1	0.31
	1 965	78.4	16.2	4.8	0.6	0.1	0.28
	1 970	81.3	14.1	4.1	0.5	0.0	0.24
	1 975	85.3	11.2	3.1	0.4	0.1	0.19
	1 980	87.2	9.9	2.6	0.3	0.1	0.16
	1 985	86.9	10.0	2.7	0.3	0.1	0.17
	1 990	88.8	8.7	2.3	0.2	0.0	0.14
	1 993	91.4	6.8	1.7	0.2	0.0	0.11


Age of man 30 years	1 940	28.5	21.1	32.3	13.8	4.3	1.45
	1 945	27.0	22.9	35.5	11.9	2.7	1.41
	1 950	31.2	24.9	34.6	8.1	1.2	1.23
	1 955	39.0	25.6	28.3	6.1	1.0	1.05
	1 960	46.2	24.8	22.4	5.6	1.0	0.91
	1 965	51.0	23.5	20.0	4.7	0.8	0.81
	1 970	55.3	22.9	17.0	4.0	0.8	0.72
	1 975	60.1	22.1	14.4	2.9	0.5	0.62
	1 980	61.3	21.6	13.8	2.8	0.6	0.60
	1 985	63.1	20.7	13.1	2.6	0.5	0.57
	1 988	65.2	19.6	12.4	2.4	0.4	0.53


Age of man 35 years	1 940	18.2	12.8	36.7	22.8	9.6	1.96
	1 945	18.0	14.9	41.8	19.8	5.5	1.81
	1 950	20.5	17.0	41.7	16.5	4.3	1.68
	1 955	24.7	18.4	37.2	15.9	3.8	1.57
	1 960	29.9	18.6	32.3	15.3	3.9	1.46
	1 965	33.2	19.4	30.8	13.4	3.2	1.35
	1 970	35.6	20.4	30.0	11.2	2.8	1.26
	1 975	38.0	20.7	28.9	10.1	2.2	1.18
	1 980	39.9	20.5	28.0	9.4	2.2	1.14
	1 983	40.5	20.7	28.0	8.9	1.8	1.12


Age of man 40 years	1 940	14.9	10.4	36.2	26.0	12.4	2.15
	1 945	14.9	12.4	41.1	23.3	8.3	2.01
	1 950	16.3	13.9	41.4	21.1	7.4	1.92
	1 955	19.2	14.7	37.4	21.4	7.4	1.86
	1 960	23.3	14.7	33.5	21.2	7.3	1.77
	1 965	25.7	15.5	33.7	19.1	6.0	1.66
	1 970	26.4	16.3	34.6	17.3	5.4	1.61
	1 975	28.3	16.5	34.4	16.4	4.4	1.54
	1 978	29.3	16.5	34.7	15.4	4.1	1.50


Age of man 45 years	1 940	13.9	10.0	35.8	26.4	13.9	2.22
	1 945	13.3	11.5	40.4	24.3	10.5	2.09
	1 950	14.8	12.6	41.0	22.3	9.3	2.02
	1 955	17.2	13.5	37.1	23.1	9.2	1.98
	1 960	20.7	13.4	34.1	22.7	9.1	1.90
	1 965	22.9	14.3	34.1	20.8	7.9	1.80
	1 970	23.3	14.8	35.4	19.4	7.0	1.75
	1 973	24.1	15.0	35.6	18.9	6.4	1.71


Age of man 50 years	1 940	13.6	9.8	35.7	26.5	14.4	2.25
	1 945	13.3	11.5	40.4	24.3	10.5	2.12
	1 950	14.4	12.3	40.7	22.6	10.0	2.06
	1 955	16.6	13.2	37.1	23.3	9.9	2.01
	1 960	19.9	13.0	34.2	23.0	9.9	1.95
	1 965	22.0	13.9	34.2	21.2	8.7	1.84
	1 968	21.7	14.7	35.2	20.4	8.1	1.83