| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 1 |
0.7%
|
|
| 2004 | 2 |
1.4%
|
|
| 2005 | 1 |
0.7%
|
|
| 2006 | 2 |
1.4%
|
|
| 2008 | 2 |
1.4%
|
|
| 2009 | 3 |
2%
|
|
| 2010 | 3 |
2%
|
|
| 2011 | 8 |
5.4%
|
|
| 2012 | 4 |
2.7%
|
|
| 2013 | 10 |
6.8%
|
|
| 2014 | 8 |
5.4%
|
|
| 2015 | 19 |
12.8%
|
|
| 2016 | 34 |
23%
|
|
| 2017 | 24 |
16.2%
|
|
| 3333 | Missing | 1 |
0.7%
|
| 5555 | Not applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 26 |
17.6%
|
| Sysmiss | 14845 |