| Value | Category | Cases | |
|---|---|---|---|
| 1975 | 233 |
6.4%
|
|
| 1976 | 386 |
10.7%
|
|
| 1977 | 330 |
9.1%
|
|
| 1978 | 475 |
13.1%
|
|
| 1979 | 362 |
10%
|
|
| 1980 | 364 |
10.1%
|
|
| 1981 | 195 |
5.4%
|
|
| 1982 | 290 |
8%
|
|
| 1983 | 170 |
4.7%
|
|
| 1984 | 203 |
5.6%
|
|
| 1985 | 179 |
4.9%
|
|
| 1986 | 171 |
4.7%
|
|
| 1987 | 180 |
5%
|
|
| 1988 | 78 |
2.2%
|
|
| 9993 | inconsistent | 0 |
0%
|
| 9998 | don't know | 1 |
0%
|
| 9999 | not applicable | 0 |
0%
|
| 9999995 | missing:impute | 0 |
0%
|
