| Value | Category | Cases | |
|---|---|---|---|
| 1992 | 2 |
4.8%
|
|
| 1993 | 2 |
4.8%
|
|
| 1995 | 1 |
2.4%
|
|
| 1997 | 1 |
2.4%
|
|
| 1998 | 3 |
7.1%
|
|
| 1999 | 7 |
16.7%
|
|
| 2000 | 4 |
9.5%
|
|
| 2001 | 3 |
7.1%
|
|
| 2003 | 1 |
2.4%
|
|
| 2004 | 5 |
11.9%
|
|
| 2005 | 5 |
11.9%
|
|
| 2006 | 6 |
14.3%
|
|
| 2007 | 2 |
4.8%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 10328 |