| Value | Category | Cases | |
|---|---|---|---|
| 2003 | 1 |
0.9%
|
|
| 2005 | 3 |
2.7%
|
|
| 2007 | 1 |
0.9%
|
|
| 2008 | 1 |
0.9%
|
|
| 2009 | 2 |
1.8%
|
|
| 2010 | 2 |
1.8%
|
|
| 2011 | 4 |
3.6%
|
|
| 2012 | 2 |
1.8%
|
|
| 2013 | 4 |
3.6%
|
|
| 2014 | 3 |
2.7%
|
|
| 2015 | 5 |
4.5%
|
|
| 2016 | 17 |
15.5%
|
|
| 2017 | 54 |
49.1%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 11 |
10%
|
| Sysmiss | 14883 |