表ヒョウ４－１５ 出生順位別出生数および割合ワリアイ：1950～2010年
年次	総  数	第１子	第２子	第３子	第４子	第５子～
	実　数
1950	2,337,507	634,324	654,572	384,455	247,790	415,163
1955	1,730,692	573,592	455,512	330,192	193,906	177,479
1960	1,606,041	714,827	522,867	221,595	79,718	67,017
1965	1,823,697	866,485	685,027	203,913	44,523	23,700
1970	1,934,239	878,979	753,834	245,824	40,207	15,395
1975	1,901,440	862,356	767,669	224,576	33,994	12,845
1980	1,576,889	667,683	642,573	227,604	29,901	9,128
1985	1,431,577	602,005	562,920	225,304	32,597	8,751
1990	1,221,585	531,648	459,569	192,788	30,453	7,127
1995	1,187,064	567,530	428,394	156,586	27,556	6,998
2000	1,190,547	583,220	434,964	141,011	24,644	6,708
2005	1,062,530	512,412	399,307	122,501	21,841	6,469
2006	1,092,674	524,581	408,531	129,555	23,164	6,843
2007	1,089,818	519,767	403,656	134,951	24,203	7,241
2008	1,091,156	517,724	402,152	137,945	25,804	7,531
2009	1,070,035	512,742	390,073	134,171	25,303	7,746
2010	1,071,304	509,736	390,212	136,302	26,885	8,169
	割  合(％)
1950	100.0	27.1	28.0	16.4	10.6	17.8
1955	100.0	33.1	26.3	19.1	11.2	10.3
1960	100.0	44.5	32.6	13.8	5.0	4.2
1965	100.0	47.5	37.6	11.2	2.4	1.3
1970	100.0	45.4	39.0	12.7	2.1	0.8
1975	100.0	45.4	40.4	11.8	1.8	0.7
1980	100.0	42.3	40.7	14.4	1.9	0.6
1985	100.0	42.1	39.3	15.7	2.3	0.6
1990	100.0	43.5	37.6	15.8	2.5	0.6
1995	100.0	47.8	36.1	13.2	2.3	0.6
2000	100.0	49.0	36.5	11.8	2.1	0.6
2005	100.0	48.2	37.6	11.5	2.1	0.6
2006	100.0	48.0	37.4	11.9	2.1	0.6
2007	100.0	47.7	37.0	12.4	2.2	0.7
2008	100.0	47.4	36.9	12.6	2.4	0.7
2009	100.0	47.9	36.5	12.5	2.4	0.7
2010	100.0	47.6	36.4	12.7	2.5	0.8