| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 51 |
21.2%
|
|
| 2001 | 113 |
46.9%
|
|
| 2002 | 56 |
23.2%
|
|
| 2003 | 17 |
7.1%
|
|
| 2004 | 3 |
1.2%
|
|
| 2005 | 1 |
0.4%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 29831 |