| Value | Category | Cases | |
|---|---|---|---|
| 1978 | 5 |
5.1%
|
|
| 1979 | 2 |
2%
|
|
| 1980 | 2 |
2%
|
|
| 1981 | 4 |
4.1%
|
|
| 1982 | 3 |
3.1%
|
|
| 1983 | 2 |
2%
|
|
| 1984 | 4 |
4.1%
|
|
| 1985 | 8 |
8.2%
|
|
| 1986 | 5 |
5.1%
|
|
| 1987 | 12 |
12.2%
|
|
| 1988 | 5 |
5.1%
|
|
| 1989 | 11 |
11.2%
|
|
| 1990 | 9 |
9.2%
|
|
| 1991 | 4 |
4.1%
|
|
| 1992 | 7 |
7.1%
|
|
| 1993 | 5 |
5.1%
|
|
| 1994 | 7 |
7.1%
|
|
| 1995 | 1 |
1%
|
|
| 1996 | 1 |
1%
|
|
| 1997 | 1 |
1%
|
|
| Sysmiss | 1333 |