| Value | Category | Cases | |
|---|---|---|---|
| 2009 | 1730 |
5.6%
|
|
| 2010 | 5671 |
18.2%
|
|
| 2011 | 5799 |
18.7%
|
|
| 2012 | 5489 |
17.7%
|
|
| 2013 | 5517 |
17.7%
|
|
| 2014 | 3251 |
10.5%
|
|
| 9997 | Inconsistent | 33 |
0.1%
|
| 9999 | Missing | 5 |
0%
|
| Sysmiss | 3588 |
11.5%
|