| 1900 | 6 | 19.2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 1910 | 7 | 16.1 | 3.9 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 1920 | 9 | 24 | 6.4 | 0 | 0 | 0 | 0 | 1 | 0 | |
| 1930 | 9 | 18.7 | 6.9 | 0 | 0 | 2 | 0 | 1 | 0 | |
| 1940 | 50 | 20.2 | 7.3 | 0 | 3 | 13 | 2 | 8 | 0 | |
| 1950 | 143 | 20.4 | 6.7 | 0 | 12 | 13 | 14 | 21 | 0 | |
| 1960 | 386 | 21.9 | 7.2 | 2 | 55 | 50 | 44 | 87 | 0.5 | |
| 1970 | 697 | 22.8 | 7.4 | 7 | 149 | 130 | 85 | 154 | 1 | |
| 1980 | 668 | 22.8 | 7.8 | 7 | 183 | 128 | 83 | 152 | 1 | |
| 1990 | 782 | 21.8 | 7.7 | 8 | 275 | 176 | 86 | 172 | 1 | |
| 2000 | 1005 | 22.2 | 8.1 | 12 | 440 | 222 | 124 | 206 | 1.2 | |
| 2010 | 536 | 22.5 | 8.3 | 16 | 261 | 117 | 57 | 128 | 3 | |
| 2020 | 133 | 21.9 | 8 | 1 | 60 | 18 | 12 | 34 | 0.8 | |