| Value | Category | Cases | |
|---|---|---|---|
| -9 | (-9) Refused | 1 |
0.1%
|
| -8 | (-8) Don't know | 57 |
2.9%
|
| 2003 | 83 |
4.2%
|
|
| 2004 | 29 |
1.5%
|
|
| 2005 | 43 |
2.2%
|
|
| 2006 | 70 |
3.6%
|
|
| 2007 | 66 |
3.4%
|
|
| 2008 | 70 |
3.6%
|
|
| 2009 | 88 |
4.5%
|
|
| 2010 | 97 |
4.9%
|
|
| 2011 | 72 |
3.7%
|
|
| 2012 | 89 |
4.5%
|
|
| 2013 | 91 |
4.6%
|
|
| 2014 | 119 |
6%
|
|
| 2015 | 135 |
6.9%
|
|
| 2016 | 123 |
6.3%
|
|
| 2017 | 157 |
8%
|
|
| 2018 | 175 |
8.9%
|
|
| 2019 | 169 |
8.6%
|
|
| 2020 | 148 |
7.5%
|
|
| 2021 | 85 |
4.3%
|
|
| Sysmiss | 20295 |