7.4 Tonga

7.4.1 Total adolescent births

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Total adolescent births per woman

	Country	5-year birth cohort	Unweighted cases	Total adolescent births
		1970 1995	304 413	0.112981331019853 0.205364086437277
1	Tonga	1970	304	0.16
2	Tonga	1975	314	0.14
3	Tonga	1980	379	0.21
4	Tonga	1985	374	0.11
5	Tonga	1990	413	0.19
6	Tonga	1995	372	0.16

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7.4.2 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
		1970 1995		1 46	1.000000000000000 3.000000000000000
1	Tonga	1970	14 years and younger	1	3.00
2	Tonga	1970	15-17 years	12	1.49
3	Tonga	1970	18-19 years	26	1.16
4	Tonga	1975	14 years and younger	1	1.00
5	Tonga	1975	15-17 years	8	1.65
6	Tonga	1975	18-19 years	32	1.12
7	Tonga	1980	15-17 years	13	1.46
8	Tonga	1980	18-19 years	44	1.19
9	Tonga	1985	14 years and younger	1	3.00
10	Tonga	1985	15-17 years	10	1.20

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7.4.3 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
		1970 1995		1 46	0.010755179111157 0.804186302613500
1	Tonga	1970	14 years and younger	1	0.05
2	Tonga	1970	15-17 years	12	0.35
3	Tonga	1970	18-19 years	26	0.60
4	Tonga	1975	14 years and younger	1	0.01
5	Tonga	1975	15-17 years	8	0.19
6	Tonga	1975	18-19 years	32	0.80
7	Tonga	1980	15-17 years	13	0.23
8	Tonga	1980	18-19 years	44	0.77
9	Tonga	1985	14 years and younger	1	0.01
10	Tonga	1985	15-17 years	10	0.26

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7.4.4 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
			5 212	0.015657778017627 0.687107834581024
1	Tonga	14 years and younger	5	0.02
2	Tonga	15-17 years	79	0.30
3	Tonga	18-19 years	212	0.69

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7.4.5 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
		1970 1975		39 269	4.197665759144401 7.022411964648300
1	Tonga	1970	All mothers	269	4.89
2	Tonga	1970	In adolescence	39	7.02
3	Tonga	1970	After adolescence	230	4.56
4	Tonga	1975	All mothers	233	4.41
5	Tonga	1975	In adolescence	39	5.66
6	Tonga	1975	After adolescence	194	4.20

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7.4.6 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
		1970 1975	1.461237204182680 2.460218396301140
1	Tonga	1970	2.46
2	Tonga	1975	1.46

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7.4.7 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
		1970 1975	233 269	0.035585236413894 0.038373590537657
1	Tonga	1970	269	0.04
2	Tonga	1975	233	0.04

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7.4.8 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
		1970 1985	239 308	23.60578245044870 25.05416308919670
1	Tonga	1970	269	25.05
2	Tonga	1975	281	24.84
3	Tonga	1980	308	24.30
4	Tonga	1985	239	23.61

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7.4.9 Adolescent parity progression ratios

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Adolescent parity progression ratios

	Country	5-year birth cohort	Progression ratio from	Unweighted cases	Ratio
		1970 1995		0 66	0.000000000000000 0.266965084869091
1	Tonga	1970	none to 1st birth	39	0.12
2	Tonga	1970	1st to 2nd birth	9	0.24
3	Tonga	1970	2nd to 3rd birth	3	0.26
4	Tonga	1970	3rd to 4th birth	0	0.00
5	Tonga	1970	4th to 5th birth	0	0.00
6	Tonga	1975	none to 1st birth	41	0.12
7	Tonga	1975	1st to 2nd birth	8	0.17
8	Tonga	1975	2nd to 3rd birth	1	0.11
9	Tonga	1975	3rd to 4th birth	0	0.00
10	Tonga	1975	4th to 5th birth	0	0.00

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7.4.10 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
		1970 1995			0 46	0.000000000000000 1.000000000000000
1	Tonga	1970	14 years and younger	none to 1st birth	1	0.00
2	Tonga	1970	15-17 years	none to 1st birth	12	0.04
3	Tonga	1970	18-19 years	none to 1st birth	26	0.08
4	Tonga	1970	14 years and younger	1st to 2nd birth	1	1.00
5	Tonga	1970	15-17 years	1st to 2nd birth	5	0.36
6	Tonga	1970	18-19 years	1st to 2nd birth	3	0.16
7	Tonga	1970	14 years and younger	2nd to 3rd birth	1	1.00
8	Tonga	1970	15-17 years	2nd to 3rd birth	2	0.35
9	Tonga	1970	18-19 years	2nd to 3rd birth	0	0.00
10	Tonga	1970	14 years and younger	3rd to 4th birth	0	0.00

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7.4.11 Rapid Repeat Birth probability

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Likelihood that an adolescent mother has a rapid repeat birth

	Country	5-year birth cohort	Likelihood
			0.170172153072482 0.579830468355145
1	Tonga	1975	0.58
2	Tonga	1980	0.47
3	Tonga	1985	0.17
4	Tonga	1990	0.20
5	Tonga	1995	0.47

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7.4.12 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
		1970 1995	9 17	0.659517997574158 1.000000000000000
1	Tonga	1970	12	0.72
2	Tonga	1975	9	1.00
3	Tonga	1980	17	0.92
4	Tonga	1985	11	0.90
5	Tonga	1990	13	0.66
6	Tonga	1995	15	0.92

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