| Value | Category | Cases | |
|---|---|---|---|
| 2007 | 286 |
6%
|
|
| 2008 | 956 |
20.2%
|
|
| 2009 | 1201 |
25.4%
|
|
| 2010 | 1242 |
26.3%
|
|
| 2011 | 1040 |
22%
|
|
| 9997 | Inconsistent | 6 |
0.1%
|
| 9998 | Don't Know | 0 |
0%
|
| 9999 | Missing | 0 |
0%
|
| Sysmiss | 2895 |