| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
0.8%
|
|
| 1995 | 2 |
1.7%
|
|
| 1996 | 2 |
1.7%
|
|
| 1998 | 1 |
0.8%
|
|
| 1999 | 2 |
1.7%
|
|
| 2000 | 6 |
5%
|
|
| 2001 | 3 |
2.5%
|
|
| 2002 | 1 |
0.8%
|
|
| 2003 | 4 |
3.3%
|
|
| 2004 | 13 |
10.7%
|
|
| 2005 | 18 |
14.9%
|
|
| 2006 | 16 |
13.2%
|
|
| 2007 | 31 |
25.6%
|
|
| 2008 | 15 |
12.4%
|
|
| 2009 | 6 |
5%
|
|
| Sysmiss | 187 |