| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 1 |
1%
|
|
| 1995 | 1 |
1%
|
|
| 1997 | 3 |
2.9%
|
|
| 1999 | 2 |
1.9%
|
|
| 2000 | 1 |
1%
|
|
| 2001 | 3 |
2.9%
|
|
| 2002 | 2 |
1.9%
|
|
| 2003 | 4 |
3.8%
|
|
| 2004 | 2 |
1.9%
|
|
| 2005 | 3 |
2.9%
|
|
| 2006 | 8 |
7.6%
|
|
| 2007 | 8 |
7.6%
|
|
| 2008 | 16 |
15.2%
|
|
| 2009 | 9 |
8.6%
|
|
| 2010 | 9 |
8.6%
|
|
| 2011 | 14 |
13.3%
|
|
| 2012 | 19 |
18.1%
|
|
| Sysmiss | 5590 |