| S50年 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 |
生産頭数 | 9,520 | 8,552 | 7,712 | 6,323 | 6,648 | 6,422 | 6,509 | 5,980 | 7,148 | 6,973 | 6,070 | 5,602 | 5,347 | 5,078 |
県外移出 | 4,108 | 3,780 | 3,516 | 3,018 | 2,955 | 2,708 | 2,257 | 2,361 | 2,807 | 2,842 | 2,509 | 2,391 | 2,106 | 15,296 |
保有率(%) | 56.8 | 55.8 | 54.4 | 52.3 | 55.6 | 57.8 | 65.3 | 60.5 | 60.7 | 59.2 | 58.7 | 57.3 | 60.6 | 74.5 |
| H1 | H2 | H3 | H4 | H5 | H6 | H7 | H8 | H9 | H10 | H11 | H12 | H13 | H14 |
生産頭数 | 5,108 | 5,416 | 5,338 | 4,895 | 5,260 | 4,583 | 4,105 | 3,696 | 3,231 | 2,968 | 2,707 | 2,582 | 2,160 | 2,257 |
県外移出 | 1,407 | 1,834 | 2,093 | 1,747 | 1,928 | 1,698 | 1,623 | 1,491 | 1,123 | 1,105 | 1,106 | 1,235 | 1,055 | 1,325 |
保有率(%) | 72.5 | 66.1 | 60.8 | 64.3 | 63.3 | 63.0 | 60.5 | 59.7 | 65.2 | 62.8 | 59.1 | 52.2 | 51.2 | 41.3 |
| H15 | | | | | | | | | | | | | |
生産頭数 | 2,099 | | | | | | | | | | | | | |
県外移出 | 1,130 | | | | | | | | | | | | | |
保有率(%) | 46.2 | | | | | | | | | | | | | |
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