| Value | Category | Cases | |
|---|---|---|---|
| 98 | Don't know | 0 |
0%
|
| 1999 | 1 |
0.6%
|
|
| 2000 | 1 |
0.6%
|
|
| 2002 | 3 |
1.8%
|
|
| 2003 | 2 |
1.2%
|
|
| 2004 | 6 |
3.5%
|
|
| 2005 | 5 |
2.9%
|
|
| 2006 | 3 |
1.8%
|
|
| 2007 | 4 |
2.3%
|
|
| 2008 | 11 |
6.4%
|
|
| 2009 | 14 |
8.2%
|
|
| 2010 | 24 |
14%
|
|
| 2011 | 46 |
26.9%
|
|
| 2012 | 50 |
29.2%
|
|
| 9998 | Don't know | 1 |
0.6%
|
| Sysmiss | 1539 |