| Value | Category | Cases | |
|---|---|---|---|
| 2008 | 2 |
0%
|
|
| 2009 | 710 |
10%
|
|
| 2010 | 1292 |
18.2%
|
|
| 2011 | 1461 |
20.5%
|
|
| 2012 | 1665 |
23.4%
|
|
| 2013 | 1893 |
26.6%
|
|
| 2014 | 90 |
1.3%
|
|
| 9997 | Inconsistent | 2 |
0%
|
| 9998 | Don't know | 0 |
0%
|
| Sysmiss | 42092 |