| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 |
0%
|
| 1992 | 1 |
0.6%
|
|
| 2005 | 6 |
3.8%
|
|
| 2006 | 65 |
40.9%
|
|
| 2007 | 10 |
6.3%
|
|
| 2008 | 13 |
8.2%
|
|
| 2009 | 9 |
5.7%
|
|
| 2010 | 42 |
26.4%
|
|
| 2011 | 13 |
8.2%
|
|
| Sysmiss | 51 |