2.36 South Africa

2.36.1 Total adolescent births

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Total adolescent births per woman

	Country	5-year birth cohort	Unweighted cases	Total adolescent births
		1945 1995	249 2748	0.417809181832753 0.591066201468634
1	South Africa	1945	253	0.59
2	South Africa	1950	1,106	0.54
3	South Africa	1955	1,387	0.55
4	South Africa	1960	1,671	0.56
5	South Africa	1965	2,280	0.57
6	South Africa	1970	2,748	0.48
7	South Africa	1975	2,311	0.43
8	South Africa	1980	1,262	0.42
9	South Africa	1985	1,383	0.42
10	South Africa	1990	1,393	0.44

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2.36.2 Total adolescent births by age at first birth

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Total adolescent births per woman by age at first birth

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Total adolescent births
		1945 1995		4 623	1.011478373975840 2.413660074522430
1	South Africa	1945	14 years and younger	6	2.28
2	South Africa	1945	15-17 years	44	1.59
3	South Africa	1945	18-19 years	60	1.08
4	South Africa	1950	14 years and younger	40	2.41
5	South Africa	1950	15-17 years	177	1.64
6	South Africa	1950	18-19 years	232	1.04
7	South Africa	1955	14 years and younger	43	2.32
8	South Africa	1955	15-17 years	236	1.51
9	South Africa	1955	18-19 years	291	1.04
10	South Africa	1960	14 years and younger	45	1.81

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2.36.3 Contribution to total adolescent fertility by cohort and age at first birth

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Contribution to total adolescent fertility by cohort and age at first birth

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Proportion
		1945 1995		4 623	0.017515913929025 0.543416986339379
1	South Africa	1945	14 years and younger	6	0.08
2	South Africa	1945	15-17 years	44	0.44
3	South Africa	1945	18-19 years	60	0.47
4	South Africa	1950	14 years and younger	40	0.14
5	South Africa	1950	15-17 years	177	0.45
6	South Africa	1950	18-19 years	232	0.41
7	South Africa	1955	14 years and younger	43	0.13
8	South Africa	1955	15-17 years	236	0.47
9	South Africa	1955	18-19 years	291	0.40
10	South Africa	1960	14 years and younger	45	0.08

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2.36.4 Contribution to total adolescent fertility by age at first birth (all cohorts)

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Contribution to total adolescent fertility by age at first birth (all cohorts)

	Country	Age at first birth	Unweighted cases	Proportion
			368 3370	0.089622726789891 0.474224417170219
1	South Africa	14 years and younger	368	0.09
2	South Africa	15-17 years	2,812	0.47
3	South Africa	18-19 years	3,370	0.44

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2.36.5 Completed fertility by motherhood entry age

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Children ever born by motherhood entry age, women aged 40 and older

	Country	5-year birth cohort	Age at first birth	Unweighted cases	Number of children
		1945 1975		74 1050	2.690553335412170 5.030315075848640
1	South Africa	1945	All mothers	244	4.48
2	South Africa	1945	In adolescence	110	5.03
3	South Africa	1945	After adolescence	134	3.99
4	South Africa	1950	All mothers	1,050	4.00
5	South Africa	1950	In adolescence	449	4.64
6	South Africa	1950	After adolescence	601	3.53
7	South Africa	1955	All mothers	721	3.74
8	South Africa	1955	In adolescence	306	4.28
9	South Africa	1955	After adolescence	415	3.33
10	South Africa	1965	All mothers	579	3.18

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2.36.6 Difference in completed fertility between adolescent and non-adolescent mothers

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Difference in completed fertility between adolescent and non-adolescent mothers

	Country	5-year birth cohort	Difference in number of births
		1945 1975	0.557142514520667 1.112671859806900
1	South Africa	1945	1.04
2	South Africa	1950	1.11
3	South Africa	1955	0.95
4	South Africa	1965	0.70
5	South Africa	1970	0.76
6	South Africa	1975	0.56

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2.36.7 Contribution of adolescent fertility to total fertility by cohort

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Contribution of adolescent fertility to total fertility by cohort

	Country	5-year birth cohort	Unweighted cases	Proportion
		1945 1975	199 1050	0.138374937754878 0.171422844765347
1	South Africa	1945	244	0.14
2	South Africa	1950	1,050	0.14
3	South Africa	1955	721	0.15
4	South Africa	1965	579	0.17
5	South Africa	1970	848	0.16
6	South Africa	1975	199	0.14

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2.36.8 Mean age at first birth

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Mean age at first birth, women with first birth before age 30

	Country	5-year birth cohort	Unweighted cases	Mean age
		1945 1985	237 1583	20.78206803774720 22.13942377489720
1	South Africa	1945	244	21.33
2	South Africa	1950	1,050	21.60
3	South Africa	1955	1,323	21.26
4	South Africa	1960	1,583	21.13
5	South Africa	1965	1,451	20.78
6	South Africa	1970	848	21.69
7	South Africa	1975	931	22.14
8	South Africa	1980	1,160	21.65
9	South Africa	1985	237	21.61

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2.36.9 Adolescent parity progression ratios

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Adolescent parity progression ratios

	Country	5-year birth cohort	Progression ratio from	Unweighted cases	Ratio
		1945 1995		0 1160	0.000000000000000 0.551628496107522
1	South Africa	1945	none to 1st birth	110	0.45
2	South Africa	1945	1st to 2nd birth	30	0.22
3	South Africa	1945	2nd to 3rd birth	9	0.32
4	South Africa	1945	3rd to 4th birth	3	0.42
5	South Africa	1945	4th to 5th birth	1	0.20
6	South Africa	1950	none to 1st birth	449	0.39
7	South Africa	1950	1st to 2nd birth	130	0.29
8	South Africa	1950	2nd to 3rd birth	28	0.20
9	South Africa	1950	3rd to 4th birth	8	0.32
10	South Africa	1950	4th to 5th birth	2	0.37

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2.36.10 Adolescent parity progression ratios by age

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Adolescent parity progression ratios by mother's age at first birth

	Country	5-year birth cohort	Age at first birth	Progression ratio from	Unweighted cases	Ratio
		1945 1995			0 623	0.000000000000000 1.000000000000000
1	South Africa	1945	14 years and younger	none to 1st birth	6	0.02
2	South Africa	1945	15-17 years	none to 1st birth	44	0.16
3	South Africa	1945	18-19 years	none to 1st birth	60	0.26
4	South Africa	1945	14 years and younger	1st to 2nd birth	4	0.61
5	South Africa	1945	15-17 years	1st to 2nd birth	19	0.40
6	South Africa	1945	18-19 years	1st to 2nd birth	7	0.08
7	South Africa	1945	14 years and younger	2nd to 3rd birth	3	0.71
8	South Africa	1945	15-17 years	2nd to 3rd birth	6	0.34
9	South Africa	1945	18-19 years	2nd to 3rd birth	0	0.00
10	South Africa	1945	14 years and younger	3rd to 4th birth	1	0.28

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2.36.11 Rapid Repeat Birth probability

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Likelihood that an adolescent mother has a rapid repeat birth

	Country	5-year birth cohort	Likelihood
			0.069734303922663 0.287430897574611
1	South Africa	1945	0.29
2	South Africa	1950	0.20
3	South Africa	1955	0.21
4	South Africa	1960	0.19
5	South Africa	1965	0.13
6	South Africa	1970	0.09
7	South Africa	1975	0.07
8	South Africa	1980	0.09
9	South Africa	1985	0.07
10	South Africa	1990	0.10

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2.36.12 Rapid Repeat Birth proportion

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Proportion of nonfirst adolescent births that are rapid repeat births

	Country	5-year birth cohort	Unweighted cases (non-first adolescent births)	Proportion
		1945 1995	12 293	0.342323967213375 0.666770889451213
1	South Africa	1945	43	0.67
2	South Africa	1950	168	0.42
3	South Africa	1955	187	0.53
4	South Africa	1960	204	0.49
5	South Africa	1965	293	0.39
6	South Africa	1970	188	0.41
7	South Africa	1975	113	0.46
8	South Africa	1980	68	0.41
9	South Africa	1985	85	0.34
10	South Africa	1990	78	0.47

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