表５−２ 性別セイベツ乳児死亡数スウ，新生児シンセイジ死亡数シボウスウ，率リツおよび性セイ比ヒ：1900〜2021年 　 　
年次 乳児ニュウジ死亡シボウ数スウ1)  乳チチ　児ジ3)
 死亡率シボウリツ		 新生児シンセイジ死亡シボウ数スウ2)  新生児シンセイジ3)
 死亡率シボウリツ
総数ソウスウ 男オトコ 女オンナ 性比 4) 総数ソウスウ 男オトコ 女オンナ 性比 4)
1900 220,211 118,470 101,740 116.4 155.0 112,259 60,081 52,177 115.1 79.0
1910 276,136 147,338 128,797 114.4 161.2 126,910 67,556 59,353 113.8 74.1
1920 335,613 179,956 155,657 115.6 165.7 139,681 75,068 64,613 116.2 69.0
1930 258,703 140,143 118,559 118.2 124.1 104,101 57,067 47,033 121.3 49.9
1940 190,509 103,900 86,609 120.0 90.0 81,869 45,439 36,430 124.7 38.7
1947 205,360 111,597 93,763 119.0 76.7 84,204 46,545 37,659 123.7 31.4
1950 140,515 76,247 64,268 118.6 60.1 64,142 35,484 28,658 123.8 27.4
1955 68,801 37,628 31,173 120.7 39.8 38,646 21,395 17,251 124.0 22.3
1960 49,293 27,714 21,579 128.4 30.7 27,362 15,544 11,818 131.5 17.0
1965 33,742 19,322 14,420 134.0 18.5 21,260 12,315 8,945 137.7 11.7
1970 25,412 14,747 10,665 138.3 13.1 16,742 9,929 6,813 145.7 8.7
1971 24,805 14,292 10,513 135.9 12.4 16,450 9,633 6,817 141.3 8.2
1972 23,773 13,840 9,933 139.3 11.7 15,817 9,439 6,378 148.0 7.8
1973 23,683 13,698 9,985 137.2 11.3 15,473 9,157 6,316 145.0 7.4
1974 21,888 12,654 9,234 137.0 10.8 14,472 8,604 5,868 146.6 7.1
1975 19,103 10,975 8,128 135.0 10.0 12,912 7,560 5,352 141.3 6.8
1976 17,105 9,843 7,262 135.5 9.3 11,638 6,896 4,742 145.4 6.4
1977 15,666 8,988 6,678 134.6 8.9 10,773 6,290 4,483 140.3 6.1
1978 14,327 8,216 6,111 134.4 8.4 9,628 5,605 4,023 139.3 5.6
1979 12,923 7,387 5,536 133.4 7.9 8,590 4,980 3,610 138.0 5.2
1980 11,841 6,754 5,087 132.8 7.5 7,796 4,522 3,274 138.1 4.9
1981 10,891 6,148 4,743 129.6 7.1 7,188 4,111 3,077 133.6 4.7
1982 9,969 5,685 4,284 132.7 6.6 6,425 3,702 2,723 136.0 4.2
1983 9,406 5,267 4,139 127.3 6.2 5,894 3,305 2,589 127.7 3.9
1984 8,920 5,075 3,845 132.0 6.0 5,527 3,130 2,397 130.6 3.7
1985 7,899 4,332 3,567 121.4 5.5 4,910 2,705 2,205 122.7 3.4
1986 7,251 4,008 3,243 123.6 5.2 4,296 2,384 1,912 124.7 3.1
1987 6,711 3,734 2,977 125.4 5.0 3,933 2,206 1,727 127.7 2.9
1988 6,265 3,434 2,831 121.3 4.8 3,592 1,943 1,649 117.8 2.7
1989 5,724 3,118 2,606 119.6 4.6 3,214 1,737 1,477 117.6 2.6
1990 5,616 3,123 2,493 125.3 4.6 3,179 1,767 1,412 125.1 2.6
1991 5,418 2,915 2,503 116.5 4.4 2,978 1,591 1,387 114.7 2.4
1992 5,477 3,103 2,374 130.7 4.5 2,905 1,631 1,274 128.0 2.4
1993 5,169 2,847 2,322 122.6 4.3 2,765 1,513 1,252 120.8 2.3
1994 5,261 2,994 2,267 132.1 4.2 2,889 1,663 1,226 135.6 2.3
1995 5,054 2,808 2,246 125.0 4.3 2,615 1,467 1,148 127.8 2.2
1996 4,546 2,532 2,014 125.7 3.8 2,438 1,358 1,080 125.7 2.0
1997 4,403 2,414 1,989 121.4 3.7 2,307 1,241 1,066 116.4 1.9
1998 4,380 2,364 2,016 117.3 3.6 2,353 1,286 1,067 120.5 2.0
1999 4,010 2,224 1,786 124.5 3.4 2,137 1,166 971 120.1 1.8
2000 3,830 2,107 1,723 122.3 3.2 2,106 1,149 957 120.1 1.8
2001 3,599 1,989 1,610 123.5 3.1 1,909 1,056 853 123.8 1.6
2002 3,497 1,903 1,594 119.4 3.0 1,937 1,046 891 117.4 1.7
2003 3,364 1,787 1,577 113.3 3.0 1,879 976 903 108.1 1.7
2004 3,122 1,716 1,406 122.0 2.8 1,622 907 715 126.9 1.5
2005 2,958 1,641 1,317 124.6 2.8 1,510 823 687 119.8 1.4
2006 2,864 1,556 1,308 119.0 2.6 1,444 782 662 118.1 1.3
2007 2,828 1,534 1,294 118.5 2.6 1,434 764 670 114.0 1.3
2008 2,798 1,488 1,310 113.6 2.6 1,331 706 625 113.0 1.2
2009 2,556 1,441 1,115 129.2 2.4 1,254 705 549 128.4 1.2
2010 2,450 1,355 1,095 123.7 2.3 1,167 657 510 128.8 1.1
2011 2,463 1,269 1,194 106.3 2.3 1,147 581 566 102.7 1.1
2012 2,299 1,222 1,077 113.5 2.2 1,065 542 523 103.6 1.0
2013 2,185 1,193 992 120.3 2.1 1,026 567 459 123.5 1.0
2014 2,080 1,110 970 114.4 2.1 952 509 443 114.9 0.9
2015 1,916 1,042 874 119.2 1.9 902 482 420 114.8 0.9
2016 1,929 980 949 103.3 2.0 875 447 428 104.4 0.9
2017 1,762 930 832 111.8 1.9 833 461 372 123.9 0.9
2018 1,748 932 816 114.2 1.9 801 427 374 114.2 0.9
2019 1,654 892 762 117.1 1.9 755 420 335 125.4 0.9
2020 1,512 800 712 112.4 1.8 704 363 341 106.5 0.8
2021 1,399 762 637 119.6 1.7 658 346 312 110.9 0.8