| Value | Category | Cases | |
|---|---|---|---|
| 2002 | 2 |
7.4%
|
|
| 2003 | 1 |
3.7%
|
|
| 2005 | 1 |
3.7%
|
|
| 2006 | 2 |
7.4%
|
|
| 2007 | 2 |
7.4%
|
|
| 2009 | 1 |
3.7%
|
|
| 2011 | 3 |
11.1%
|
|
| 2012 | 7 |
25.9%
|
|
| 2013 | 3 |
11.1%
|
|
| 2014 | 4 |
14.8%
|
|
| 2015 | 1 |
3.7%
|
|
| 9998 | don't know | 0 |
0%
|
| Sysmiss | 12888 |