| Value | Category | Cases | |
|---|---|---|---|
| 1993 | 1 |
1.2%
|
|
| 1996 | 3 |
3.5%
|
|
| 2000 | 1 |
1.2%
|
|
| 2006 | 2 |
2.3%
|
|
| 2007 | 6 |
7%
|
|
| 2008 | 64 |
74.4%
|
|
| 2009 | 4 |
4.7%
|
|
| 2010 | 1 |
1.2%
|
|
| 2011 | 2 |
2.3%
|
|
| 2012 | 2 |
2.3%
|