| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 305 |
14%
|
|
| 2008 | 359 |
16.5%
|
|
| 2009 | 385 |
17.7%
|
|
| 2010 | 432 |
19.8%
|
|
| 2011 | 430 |
19.8%
|
|
| 2012 | 266 |
12.2%
|
|
| 9998 | don't know | 0 |
0%
|
| 9999 | not applicable | 0 |
0%
|
| 9999995 | missing:impute | 0 |
0%
|
| Sysmiss | 3 |