表５−２ 性別セイベツ乳児死亡数スウ，率リツおよび性セイ比ヒ：1900〜2006年
年次	乳児ニュウジ死亡シボウ数スウ			乳児ニュウジ死亡率シボウリツ	死亡シボウ性セイ比ヒ1)	総ソウ死亡シボウに占シめる割合ワリアイ（％）
	総数ソウスウ	男オトコ	女オンナ	(出生シュッショウ1,000対ツイ)
1900	220,211	118,470	101,740	155.0	116.4	24.2
1910	276,136	147,338	128,797	161.2	114.4	25.9
1920	335,613	179,956	155,657	165.7	115.6	23.6
1930	258,703	140,143	118,559	124.1	118.2	22.1
1940	190,509	103,900	86,609	90.0	120.0	16.1
1947	205,360	111,597	93,763	76.7	119.0	18.0
1948	165,406	90,779	74,627	61.7	121.6	17.4
1949	168,467	91,422	77,045	62.5	118.7	17.8
1950	140,515	76,247	64,268	60.1	118.6	15.5
1951	122,869	66,864	56,005	57.5	119.4	14.6
1952	99,114	54,049	45,065	49.4	119.9	13.0
1953	91,424	49,839	41,585	48.9	119.8	11.8
1954	78,944	43,171	35,773	44.6	120.7	10.9
1955	68,801	37,628	31,173	39.8	120.7	9.9
1956	67,691	37,309	30,382	40.6	122.8	9.3
1957	62,678	34,828	27,850	40.0	125.1	8.3
1958	57,052	31,671	25,381	34.5	124.8	8.3
1959	54,768	30,646	24,122	33.7	127.0	7.9
1960	49,293	27,714	21,579	30.7	128.4	7.0
1961	45,465	25,893	19,572	28.6	132.3	6.5
1962	42,797	24,159	18,638	26.4	129.6	6.0
1963	38,442	21,763	16,679	23.2	130.5	5.7
1964	34,967	19,922	15,045	20.4	132.4	5.2
1965	33,742	19,322	14,420	18.5	134.0	4.8
1966	26,217	15,024	11,193	19.3	134.2	3.9
1967	28,928	16,628	12,300	14.9	135.2	4.3
1968	28,600	16,676	11,924	15.3	139.9	4.2
1969	26,874	15,544	11,330	14.2	137.2	3.9
1970	25,412	14,747	10,665	13.1	138.3	3.6
1971	24,805	14,292	10,513	12.4	135.9	3.6
1972	23,773	13,840	9,933	11.7	139.3	3.5
1973	23,683	13,698	9,985	11.3	137.2	3.3
1974	21,888	12,654	9,234	10.8	137.0	3.1
1975	19,103	10,975	8,128	10.0	135.0	2.7
1976	17,105	9,843	7,262	9.3	135.5	2.4
1977	15,666	8,988	6,678	8.9	134.6	2.3
1978	14,327	8,216	6,111	8.4	134.4	2.1
1979	12,923	7,387	5,536	7.9	133.4	1.9
1980	11,841	6,754	5,087	7.5	132.8	1.6
1981	10,891	6,148	4,743	7.1	129.6	1.5
1982	9,969	5,685	4,284	6.6	132.7	1.4
1983	9,406	5,267	4,139	6.2	127.3	1.3
1984	8,920	5,075	3,845	6.0	132.0	1.2
1985	7,899	4,332	3,567	5.5	121.4	1.1
1986	7,251	4,008	3,243	5.2	123.6	1.0
1987	6,711	3,734	2,977	5.0	125.4	0.9
1988	6,265	3,434	2,831	4.8	121.3	0.8
1989	5,724	3,118	2,606	4.6	119.6	0.7
1990	5,616	3,123	2,493	4.6	125.3	0.7
1991	5,418	2,915	2,503	4.4	116.5	0.7
1992	5,477	3,103	2,374	4.5	130.7	0.6
1993	5,169	2,847	2,322	4.3	122.6	0.6
1994	5,261	2,994	2,267	4.2	132.1	0.6
1995	5,054	2,808	2,246	4.3	125.0	0.5
1996	4,546	2,532	2,014	3.8	125.7	0.5
1997	4,403	2,414	1,989	3.7	121.4	0.5
1998	4,380	2,364	2,016	3.6	117.3	0.5
1999	4,010	2,224	1,786	3.4	124.5	0.4
2000	3,830	2,107	1,723	3.2	122.3	0.4
2001	3,599	1,989	1,610	3.1	123.5	0.4
2002	3,497	1,903	1,594	3.0	119.4	0.4
2003	3,364	1,787	1,577	3.0	113.3	0.3
2004	3,122	1,716	1,406	2.8	122.0	0.3
2005	2,958	1,641	1,317	2.8	124.6	0.3
2006	2,864	1,556	1,308	2.6	119.0	0.3