| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 1 |
2%
|
|
| 1999 | 3 |
6.1%
|
|
| 2000 | 2 |
4.1%
|
|
| 2001 | 1 |
2%
|
|
| 2002 | 4 |
8.2%
|
|
| 2003 | 7 |
14.3%
|
|
| 2004 | 5 |
10.2%
|
|
| 2005 | 16 |
32.7%
|
|
| 2006 | 9 |
18.4%
|
|
| 2007 | 1 |
2%
|
|
| Sysmiss | 873 |