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調査年小計4人以下5人以上9人以下
10人以上29人以下
30人以上99人以下
100人以上299人以下
300人以上不　明
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1980 27,082 13,829 6,292 3,426 873 108 12 2,542
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1981 28,005 15,539 5,995 3,330 715 86 12 2,328
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1982 26,935 15,157 5,795 3,133 675 70 11 2,094
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1983 28,569 16,355 5,950 3,454 697 67 6 2,040
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1984 30,004 16,810 6,586 3,689 774 88 14 2,043
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1985 26,658 15,055 5,452 3,445 719 79 7 1,901
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1986 23,309 12,888 4,774 3,193 799 109 17 1,529
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1987 16,200 9,461 3,136 2,051 430 63 4 1,055
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1988 12,918 7,865 2,509 1,516 318 35 5 670
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1989 9,361 6,009 1,634 977 201 19 3 518
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1990 8,364 5,408 1,471 875 170 23 4 413
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1991 12,857 7,892 2,470 1,638 356 51 9 441
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1992 15,668 9,271 3,126 2,253 536 82 16 384
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1993 15,804 9,170 3,466 2,220 608 94 14 232
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1994 15,220 8,911 3,210 2,198 531 71 12 287
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1995 16,095 9,323 3,494 2,403 567 89 6 213
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1996 15,628 8,779 3,726 2,366 553 61 5 138
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1997 17,171 9,301 4,197 2,781 667 83 29 113
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1998 19,678 10,550 4,515 3,342 910 142 28 191
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1999 15,730 8,612 3,557 2,472 726 87 13 263
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2000 19,147 10,178 4,431 3,240 809 130 32 327
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2001 19,577 9,641 4,683 3,660 1,040 142 45 366
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2002 19,491 9,925 4,415 3,598 1,046 157 29 321
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2003 16,542 9,057 3,471 2,822 755 147 30 260
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2004 13,980 7,836 2,699 2,191 599 108 17 530
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2005 13,307 7,423 2,481 1,993 580 81 14 735
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2006 13,571 7,255 2,427 1,983 521 107 9 1,269
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2007 14,415 7,155 2,621 2,178 698 86 18 1,659
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2008 15,954 6,701 2,824 2,688 780 163 32 2,766
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2009 16,000 6,537 2,620 2,474 799 117 29 3,424
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2010 13,858 5,829 2,131 1,844 498 59 12 3,485
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2011 13,236 5,797 2,070 1,683 410 46 5 3,225
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2012 12,504 6,080 1,931 1,506 364 40 8 2,575
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2013 11,267 7,781 1,764 1,322 305 36 5 54
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2014 10,119 7,170 1,486 1,111 272 30 2 48
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2015 9,170 6,592 1,293 981 236 30 2 36
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2016 8,849 6,503 1,198 878 192 25 2 51
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2017 8,894 6,703 1,196 784 163 26 7 15
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2018 8,756 6,632 1,123 821 158 16 0 6
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2019 8,896 6,679 1,142 820 191 22 3 39
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2020 8,403 6,521 988 685 185 18 6 0
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2021 6,502 5,157 747 457 125 16 0 0
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2022 6,838 5,202 846 618 158 10 4 0
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2023 9,185 7,004 1,187 780 186 21 7 0
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2024 10,542 8,111 1,330 889 180 24 8 0
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2025 10,827 8,403 1,365 868 164 22 5 0
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