| Value | Category | Cases | |
|---|---|---|---|
| -95 | Missing | 0 |
0%
|
| 2003 | 1 |
1.7%
|
|
| 2006 | 15 |
25.4%
|
|
| 2007 | 8 |
13.6%
|
|
| 2008 | 7 |
11.9%
|
|
| 2009 | 8 |
13.6%
|
|
| 2010 | 18 |
30.5%
|
|
| 2011 | 2 |
3.4%
|
|
| Sysmiss | 151 |