| Value | Category | Cases | |
|---|---|---|---|
| -9 | (-9) Refused | 2 |
0.1%
|
| -8 | (-8) Don't know | 46 |
2.3%
|
| 2003 | 68 |
3.4%
|
|
| 2004 | 21 |
1.1%
|
|
| 2005 | 45 |
2.3%
|
|
| 2006 | 56 |
2.8%
|
|
| 2007 | 62 |
3.1%
|
|
| 2008 | 66 |
3.3%
|
|
| 2009 | 80 |
4%
|
|
| 2010 | 89 |
4.5%
|
|
| 2011 | 78 |
3.9%
|
|
| 2012 | 83 |
4.2%
|
|
| 2013 | 92 |
4.6%
|
|
| 2014 | 126 |
6.3%
|
|
| 2015 | 139 |
7%
|
|
| 2016 | 128 |
6.4%
|
|
| 2017 | 171 |
8.6%
|
|
| 2018 | 180 |
9.1%
|
|
| 2019 | 176 |
8.9%
|
|
| 2020 | 140 |
7%
|
|
| 2021 | 138 |
6.9%
|
|
| Sysmiss | 20276 |