| Value | Category | Cases | |
|---|---|---|---|
| 1991 | 1 |
5.9%
|
|
| 1996 | 1 |
5.9%
|
|
| 1997 | 1 |
5.9%
|
|
| 1998 | 1 |
5.9%
|
|
| 2000 | 2 |
11.8%
|
|
| 2001 | 3 |
17.6%
|
|
| 2002 | 3 |
17.6%
|
|
| 2003 | 1 |
5.9%
|
|
| 2004 | 2 |
11.8%
|
|
| 2005 | 1 |
5.9%
|
|
| 2006 | 1 |
5.9%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 10353 |