| Value | Category | Cases | |
|---|---|---|---|
| 1994 | 1 |
2.9%
|
|
| 2002 | 2 |
5.7%
|
|
| 2003 | 2 |
5.7%
|
|
| 2005 | 2 |
5.7%
|
|
| 2006 | 3 |
8.6%
|
|
| 2007 | 2 |
5.7%
|
|
| 2009 | 3 |
8.6%
|
|
| 2010 | 1 |
2.9%
|
|
| 2011 | 3 |
8.6%
|
|
| 2012 | 7 |
20%
|
|
| 2013 | 3 |
8.6%
|
|
| 2014 | 5 |
14.3%
|
|
| 2015 | 1 |
2.9%
|
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 35748 |