| Value | Category | Cases | |
|---|---|---|---|
| -99 | Refused | 0 |
0%
|
| -98 | Don't Know | 1 |
2.6%
|
| -97 | Not Applicable | 0 |
0%
|
| 1998 | 1 |
2.6%
|
|
| 2008 | 1 |
2.6%
|
|
| 2009 | 2 |
5.1%
|
|
| 2011 | 6 |
15.4%
|
|
| 2012 | 19 |
48.7%
|
|
| 2013 | 9 |
23.1%
|
|
| Sysmiss | 2183 |