| Value | Category | Cases | |
|---|---|---|---|
| 1996 | 5 |
6.4%
|
|
| 1997 | 3 |
3.8%
|
|
| 1998 | 7 |
9%
|
|
| 1999 | 4 |
5.1%
|
|
| 2000 | 12 |
15.4%
|
|
| 2001 | 20 |
25.6%
|
|
| 2002 | 3 |
3.8%
|
|
| 2003 | 2 |
2.6%
|
|
| 2004 | 1 |
1.3%
|
|
| 2005 | 2 |
2.6%
|
|
| 2006 | 2 |
2.6%
|
|
| 2009 | 1 |
1.3%
|
|
| 2010 | 2 |
2.6%
|
|
| 2011 | 11 |
14.1%
|
|
| 2012 | 3 |
3.8%
|