7.5 Summary Oceania

7.5.1 Total adolescent births

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Total adolescent births per woman

	Region	5-year birth cohort	Unweighted average	Weighted average
		1940 1995	0.283473812962471 0.841269841269842	0.399274047186932 0.841269841269842
1	Oceania	1940	0.84	0.84
2	Oceania	1945	0.57	0.57
3	Oceania	1950	0.40	0.40
4	Oceania	1965	0.54	0.61
5	Oceania	1970	0.33	0.44
6	Oceania	1975	0.33	0.45
7	Oceania	1980	0.32	0.48
8	Oceania	1985	0.28	0.47
9	Oceania	1990	0.33	0.49
10	Oceania	1995	0.31	0.52

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7.5.2 Total adolescent births by age at first birth

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Total adolescent births per woman by age of first birth

	Region	5-year birth cohort	Age at first birth	Unweighted average	Weighted average
		1940 1995		1.050300305900290 3.778908088683330	1.046083251991330 3.488888888888890
1	Oceania	1940	14 years and younger	3.49	3.49
2	Oceania	1940	15-17 years	2.14	2.14
3	Oceania	1940	18-19 years	1.14	1.14
4	Oceania	1945	14 years and younger	3.40	3.40
5	Oceania	1945	15-17 years	1.94	1.94
6	Oceania	1945	18-19 years	1.08	1.08
7	Oceania	1950	14 years and younger	3.11	3.11
8	Oceania	1950	15-17 years	1.78	1.78
9	Oceania	1950	18-19 years	1.15	1.15
10	Oceania	1965	14 years and younger	3.78	2.60

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

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Contribution to total adolescent fertility by age at first birth

	Region	5-year birth cohort	Age at first birth	Unweighted average	Weighted average
		1940 1995		0.063636363636363 0.582976897396354	0.063636363636363 0.577272727272728
1	Oceania	1940	14 years and younger	0.19	0.19
2	Oceania	1940	15-17 years	0.50	0.50
3	Oceania	1940	18-19 years	0.32	0.32
4	Oceania	1945	14 years and younger	0.17	0.17
5	Oceania	1945	15-17 years	0.45	0.45
6	Oceania	1945	18-19 years	0.38	0.38
7	Oceania	1950	14 years and younger	0.06	0.06
8	Oceania	1950	15-17 years	0.36	0.36
9	Oceania	1950	18-19 years	0.58	0.58
10	Oceania	1965	14 years and younger	0.17	0.23

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7.5.4 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)

	Region	Age at first birth	Unweighted average	Weighted average
			0.107096176305862 0.497097700176209	0.170829809084117 0.432298958189282
1	Oceania	14 years and younger	0.11	0.17
2	Oceania	15-17 years	0.40	0.43
3	Oceania	18-19 years	0.50	0.40

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7.5.5 Completed fertility by motherhood entry age

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Completed fertility by motherhood entry age

	Region	5-year birth cohort	Age at first birth	Unweighted average	Weighted average
		1965 1975		4.105788230113450 5.951488952676230	4.320769086214091 5.470550352396390
1	Oceania	1965	All mothers	4.60	4.82
2	Oceania	1965	In adolescence	5.30	4.99
3	Oceania	1965	After adolescence	4.16	4.72
4	Oceania	1970	All mothers	4.64	4.79
5	Oceania	1970	In adolescence	5.95	5.47
6	Oceania	1970	After adolescence	4.28	4.49
7	Oceania	1975	All mothers	4.46	4.67
8	Oceania	1975	In adolescence	5.40	5.25
9	Oceania	1975	After adolescence	4.11	4.32

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

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Difference in completed fertility between adolescent and non-adolescent mothers

	Region	5-year birth cohort	Unweighted average	Weighted average
		1965 1975	1.141313886060110 1.674955048041800	0.269590659696451 0.982703865435740
1	Oceania	1965	1.14	0.27
2	Oceania	1970	1.67	0.98
3	Oceania	1975	1.29	0.93

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7.5.7 Contribution of adolescent fertility to total fertility by cohort

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Contribution of adolescent fertility to total fertility by cohort

	Region	5-year birth cohort	Unweighted proportion	Weighted proportion
		1965 1975	0.077606223696961 0.123577074153055	0.097392089302346 0.135495487486333
1	Oceania	1965	0.12	0.14
2	Oceania	1970	0.08	0.10
3	Oceania	1975	0.08	0.11

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7.5.8 Mean age at first birth

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

	Region	5-year birth cohort	Unweighted average	Weighted average
		1940 1985	20.06832651205090 23.48677562804880	20.06832651205090 22.63870586738880
1	Oceania	1940	20.1	20.1
2	Oceania	1965	22.1	21.9
3	Oceania	1970	23.5	22.6
4	Oceania	1975	23.1	22.2
5	Oceania	1980	23.0	21.8
6	Oceania	1985	22.6	21.5

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7.5.9 Adolescent parity progression ratios

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Adolescent parity progression ratios

	Region	5-year birth cohort	Progression ratio from	Unweighted average	Weighted average
		1940 1995		0.000000000000000 0.500000000000000	0.000000000000000 0.483164215866814
1	Oceania	1940	4th to 5th birth	0.27	0.27
2	Oceania	1940	3rd to 4th birth	0.35	0.35
3	Oceania	1940	2nd to 3rd birth	0.42	0.42
4	Oceania	1940	1st to 2nd birth	0.47	0.47
5	Oceania	1940	none to 1st birth	0.48	0.48
6	Oceania	1945	4th to 5th birth	0.27	0.27
7	Oceania	1945	3rd to 4th birth	0.26	0.26
8	Oceania	1945	2nd to 3rd birth	0.34	0.34
9	Oceania	1945	1st to 2nd birth	0.39	0.39
10	Oceania	1945	none to 1st birth	0.36	0.36

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7.5.10 Adolescent parity progression ratios by age (all cohorts)

Do individual cohorts?

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

	Region	Age at first birth	Progression ratio from	Unweighted average	Weighted average
				0.000000000000000 0.674608914870630	0.000000000000000 0.788662092616713
1	Oceania	14 years and younger	none to 1st birth	0.02	0.04
2	Oceania	15-17 years	none to 1st birth	0.09	0.13
3	Oceania	18-19 years	none to 1st birth	0.16	0.18
4	Oceania	14 years and younger	1st to 2nd birth	0.67	0.79
5	Oceania	15-17 years	1st to 2nd birth	0.51	0.56
6	Oceania	18-19 years	1st to 2nd birth	0.09	0.07
7	Oceania	14 years and younger	2nd to 3rd birth	0.56	0.57
8	Oceania	15-17 years	2nd to 3rd birth	0.20	0.20
9	Oceania	18-19 years	2nd to 3rd birth	0.01	0.01
10	Oceania	14 years and younger	3rd to 4th birth	0.32	0.24

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

	Region	Age at first birth	5-yr birth cohort	Progression ratio from	Unweighted average	Weighted average
			1940 1995		0.000000000000000 0.942857142857143	0.000000000000000 0.942857142857143
1	Oceania	14 years and younger	1940	none to 1st birth	0.04	0.04
2	Oceania	15-17 years	1940	none to 1st birth	0.20	0.20
3	Oceania	18-19 years	1940	none to 1st birth	0.23	0.23
4	Oceania	14 years and younger	1940	1st to 2nd birth	0.84	0.84
5	Oceania	15-17 years	1940	1st to 2nd birth	0.79	0.79
6	Oceania	18-19 years	1940	1st to 2nd birth	0.14	0.14
7	Oceania	14 years and younger	1940	2nd to 3rd birth	0.92	0.92
8	Oceania	15-17 years	1940	2nd to 3rd birth	0.38	0.38
9	Oceania	18-19 years	1940	2nd to 3rd birth	0.00	0.00
10	Oceania	14 years and younger	1940	3rd to 4th birth	0.69	0.69

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7.5.11 Rapid Repeat Birth probability

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Likelihood that an adolescent mother has a rapid repeat birth before turning 20

	Region	5-year birth cohort	Unweighted average	Weighted average
		1940 1995	0.223904463413387 0.527273560421422	0.182964491864325 0.527273560421422
1	Oceania	1940	0.53	0.53
2	Oceania	1945	0.49	0.49
3	Oceania	1950	0.47	0.47
4	Oceania	1965	0.26	0.26
5	Oceania	1970	0.31	0.29
6	Oceania	1975	0.35	0.23
7	Oceania	1980	0.31	0.23
8	Oceania	1985	0.24	0.28
9	Oceania	1990	0.22	0.26
10	Oceania	1995	0.27	0.18

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7.5.12 Rapid Repeat Birth proportion

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Proportion of all nonfirst adolescent births that are rapid repeat births before

	Region	5-year birth cohort	Unweighted average	Weighted average
		1940 1995	0.585516454228665 0.795081967213115	0.415300061421185 0.795081967213115
1	Oceania	1940	0.73	0.73
2	Oceania	1945	0.75	0.75
3	Oceania	1950	0.80	0.80
4	Oceania	1965	0.60	0.42
5	Oceania	1970	0.62	0.54
6	Oceania	1975	0.70	0.53
7	Oceania	1980	0.68	0.53
8	Oceania	1985	0.68	0.54
9	Oceania	1990	0.59	0.52
10	Oceania	1995	0.63	0.43

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