| Value | Category | Cases | |
|---|---|---|---|
| 2005 | 3 |
2.3%
|
|
| 2006 | 7 |
5.4%
|
|
| 2007 | 3 |
2.3%
|
|
| 2008 | 11 |
8.5%
|
|
| 2009 | 24 |
18.6%
|
|
| 2010 | 51 |
39.5%
|
|
| 2011 | 26 |
20.2%
|
|
| 2012 | 4 |
3.1%
|
|
| 8888 | Don't Know | 0 |
0%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 2745 |