| Value | Category | Cases | |
|---|---|---|---|
| 1997 | 1 |
1.5%
|
|
| 1999 | 1 |
1.5%
|
|
| 2000 | 2 |
3.1%
|
|
| 2001 | 1 |
1.5%
|
|
| 2003 | 1 |
1.5%
|
|
| 2004 | 2 |
3.1%
|
|
| 2005 | 1 |
1.5%
|
|
| 2006 | 2 |
3.1%
|
|
| 2007 | 3 |
4.6%
|
|
| 2009 | 3 |
4.6%
|
|
| 2010 | 7 |
10.8%
|
|
| 2011 | 2 |
3.1%
|
|
| 2012 | 3 |
4.6%
|
|
| 2013 | 10 |
15.4%
|
|
| 2014 | 26 |
40%
|
|
| Sysmiss | 382 |