| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 3 |
1.5%
|
|
| 1996 | 3 |
1.5%
|
|
| 1998 | 3 |
1.5%
|
|
| 1999 | 17 |
8.7%
|
|
| 2000 | 70 |
35.7%
|
|
| 2001 | 33 |
16.8%
|
|
| 2002 | 1 |
0.5%
|
|
| 2003 | 2 |
1%
|
|
| 2004 | 4 |
2%
|
|
| 2005 | 1 |
0.5%
|
|
| 2006 | 49 |
25%
|
|
| 2007 | 2 |
1%
|
|
| 2008 | 2 |
1%
|
|
| 2009 | 2 |
1%
|
|
| 2013 | 4 |
2%
|
|
| Sysmiss | 5 |