| Value | Category | Cases | |
|---|---|---|---|
| 1995 | 1 |
0.1%
|
|
| 1998 | 2 |
0.2%
|
|
| 2002 | 10 |
0.9%
|
|
| 2003 | 8 |
0.7%
|
|
| 2004 | 24 |
2.2%
|
|
| 2005 | 38 |
3.5%
|
|
| 2006 | 47 |
4.3%
|
|
| 2007 | 51 |
4.6%
|
|
| 2008 | 51 |
4.6%
|
|
| 2009 | 58 |
5.3%
|
|
| 2010 | 74 |
6.7%
|
|
| 2011 | 64 |
5.8%
|
|
| 2012 | 69 |
6.3%
|
|
| 2013 | 57 |
5.2%
|
|
| 2014 | 75 |
6.8%
|
|
| 2015 | 96 |
8.7%
|
|
| 2016 | 81 |
7.4%
|
|
| 2017 | 26 |
2.4%
|
|
| 3333 | Missing | 5 |
0.5%
|
| 5555 | Not applicable | 1 |
0.1%
|
| 8888 | Refused | 5 |
0.5%
|
| 9999 | Don't know | 258 |
23.4%
|
| Sysmiss | 13892 |