| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 79 |
32.6%
|
|
| 2001 | 96 |
39.7%
|
|
| 2002 | 47 |
19.4%
|
|
| 2003 | 16 |
6.6%
|
|
| 2004 | 4 |
1.7%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | DK | 0 |
0%
|
| Sysmiss | 29830 |