| Value | Category | Cases | |
|---|---|---|---|
| 99 | Missing | 1 |
0.4%
|
| 1992 | 1 |
0.4%
|
|
| 1994 | 1 |
0.4%
|
|
| 1999 | 1 |
0.4%
|
|
| 2000 | 6 |
2.3%
|
|
| 2001 | 4 |
1.5%
|
|
| 2002 | 5 |
1.9%
|
|
| 2003 | 5 |
1.9%
|
|
| 2004 | 7 |
2.6%
|
|
| 2005 | 9 |
3.4%
|
|
| 2006 | 14 |
5.3%
|
|
| 2007 | 14 |
5.3%
|
|
| 2008 | 34 |
12.8%
|
|
| 2009 | 36 |
13.6%
|
|
| 2010 | 45 |
17%
|
|
| 2011 | 40 |
15.1%
|
|
| 2012 | 35 |
13.2%
|
|
| 2013 | 7 |
2.6%
|
|
| Sysmiss | 1460 |