| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
1.2%
|
|
| 1995 | 1 |
1.2%
|
|
| 2000 | 1 |
1.2%
|
|
| 2002 | 2 |
2.4%
|
|
| 2004 | 1 |
1.2%
|
|
| 2005 | 1 |
1.2%
|
|
| 2007 | 5 |
5.9%
|
|
| 2008 | 45 |
52.9%
|
|
| 2009 | 28 |
32.9%
|
|
| Sysmiss | 221 |