| Value | Category | Cases | |
|---|---|---|---|
| 1973 | 178 |
2.9%
|
|
| 1982 | 363 |
5.9%
|
|
| 1983 | 132 |
2.2%
|
|
| 1984 | 192 |
3.1%
|
|
| 1985 | 4 |
0.1%
|
|
| 1986 | 916 |
14.9%
|
|
| 1987 | 283 |
4.6%
|
|
| 1988 | 262 |
4.3%
|
|
| 1989 | 195 |
3.2%
|
|
| 1990 | 399 |
6.5%
|
|
| 1991 | 351 |
5.7%
|
|
| 1992 | 754 |
12.3%
|
|
| 1993 | 88 |
1.4%
|
|
| 1994 | 499 |
8.1%
|
|
| 1995 | 363 |
5.9%
|
|
| 1996 | 209 |
3.4%
|
|
| 1997 | 418 |
6.8%
|
|
| 1999 | 325 |
5.3%
|
|
| 2000 | 193 |
3.1%
|
|
| 3333 | Missing | 6 |
0.1%
|