| Value | Category | Cases | |
|---|---|---|---|
| 1984 | 4 |
1.3%
|
|
| 1985 | 5 |
1.7%
|
|
| 1986 | 1 |
0.3%
|
|
| 1987 | 4 |
1.3%
|
|
| 1988 | 6 |
2%
|
|
| 1989 | 4 |
1.3%
|
|
| 1990 | 3 |
1%
|
|
| 1991 | 9 |
3%
|
|
| 1992 | 7 |
2.3%
|
|
| 1993 | 14 |
4.7%
|
|
| 1994 | 18 |
6%
|
|
| 1995 | 7 |
2.3%
|
|
| 1996 | 11 |
3.7%
|
|
| 1997 | 13 |
4.4%
|
|
| 1998 | 10 |
3.4%
|
|
| 1999 | 16 |
5.4%
|
|
| 2000 | 17 |
5.7%
|
|
| 2001 | 22 |
7.4%
|
|
| 2002 | 15 |
5%
|
|
| 2003 | 18 |
6%
|
|
| 2004 | 20 |
6.7%
|
|
| 2005 | 20 |
6.7%
|
|
| 2006 | 31 |
10.4%
|
|
| 2007 | 22 |
7.4%
|
|
| 9997 | Inconsistent | 1 |
0.3%
|
| 9998 | DK | 0 |
0%
|
| 9999 | 1 | ||
| Sysmiss | 10071 |