| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
0.8%
|
|
| 2002 | 1 |
0.8%
|
|
| 2003 | 6 |
4.5%
|
|
| 2004 | 46 |
34.8%
|
|
| 2005 | 39 |
29.5%
|
|
| 2006 | 24 |
18.2%
|
|
| 9998 | 15 |
11.4%
|
|
| Sysmiss | 133 |