| Value | Category | Cases | |
|---|---|---|---|
| 99 | Missing | 1 |
1.1%
|
| 1998 | 1 |
1.1%
|
|
| 1999 | 1 |
1.1%
|
|
| 2000 | 2 |
2.1%
|
|
| 2002 | 1 |
1.1%
|
|
| 2005 | 3 |
3.2%
|
|
| 2006 | 5 |
5.3%
|
|
| 2007 | 7 |
7.4%
|
|
| 2008 | 8 |
8.5%
|
|
| 2009 | 15 |
16%
|
|
| 2010 | 6 |
6.4%
|
|
| 2011 | 18 |
19.1%
|
|
| 2012 | 23 |
24.5%
|
|
| 2013 | 3 |
3.2%
|
|
| Sysmiss | 1631 |