| Value | Category | Cases | |
|---|---|---|---|
| 99 | Missing | 0 |
0%
|
| 2004 | 1 |
14.3%
|
|
| 2008 | 1 |
14.3%
|
|
| 2010 | 1 |
14.3%
|
|
| 2011 | 1 |
14.3%
|
|
| 2012 | 3 |
42.9%
|
|
| Sysmiss | 1718 |