| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 322 |
2.6%
|
|
| 2010 | 2043 |
16.4%
|
|
| 2011 | 2488 |
20%
|
|
| 2012 | 2582 |
20.7%
|
|
| 2013 | 3076 |
24.7%
|
|
| 2014 | 1951 |
15.7%
|
|
| 9997 | Inconsistent | 0 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 8502 |