| Value | Category | Cases | |
|---|---|---|---|
| 1989 | 1 |
2.6%
|
|
| 1991 | 1 |
2.6%
|
|
| 1993 | 1 |
2.6%
|
|
| 1994 | 2 |
5.3%
|
|
| 1995 | 3 |
7.9%
|
|
| 1996 | 2 |
5.3%
|
|
| 1997 | 2 |
5.3%
|
|
| 1998 | 2 |
5.3%
|
|
| 1999 | 2 |
5.3%
|
|
| 2000 | 6 |
15.8%
|
|
| 2001 | 7 |
18.4%
|
|
| 2002 | 4 |
10.5%
|
|
| 2003 | 1 |
2.6%
|
|
| 2005 | 1 |
2.6%
|
|
| 2006 | 3 |
7.9%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| 9999 | 1 | ||
| Sysmiss | 10331 |