| Value | Category | Cases | |
|---|---|---|---|
| 1978 | 1 |
1.2%
|
|
| 1980 | 2 |
2.3%
|
|
| 1983 | 2 |
2.3%
|
|
| 1984 | 3 |
3.5%
|
|
| 1985 | 1 |
1.2%
|
|
| 1986 | 1 |
1.2%
|
|
| 1987 | 6 |
7%
|
|
| 1989 | 3 |
3.5%
|
|
| 1990 | 4 |
4.7%
|
|
| 1991 | 1 |
1.2%
|
|
| 1992 | 2 |
2.3%
|
|
| 1993 | 2 |
2.3%
|
|
| 1994 | 4 |
4.7%
|
|
| 1995 | 3 |
3.5%
|
|
| 1996 | 2 |
2.3%
|
|
| 1997 | 5 |
5.8%
|
|
| 1998 | 8 |
9.3%
|
|
| 1999 | 3 |
3.5%
|
|
| 2000 | 12 |
14%
|
|
| 2001 | 9 |
10.5%
|
|
| 2002 | 12 |
14%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 1345 |