| Value | Category | Cases | |
|---|---|---|---|
| 2000 | 1 |
0%
|
|
| 2001 | 66 |
1.7%
|
|
| 2002 | 300 |
7.7%
|
|
| 2003 | 527 |
13.4%
|
|
| 2004 | 781 |
19.9%
|
|
| 2005 | 1409 |
36%
|
|
| 2006 | 429 |
10.9%
|
|
| 9998 | 3 |
0.1%
|
|
| 9999 | Missing | 403 |
10.3%
|
| Sysmiss | 18593 |