| Value | Category | Cases | |
|---|---|---|---|
| 99 | Missing | 1 |
0.3%
|
| 1990 | 1 |
0.3%
|
|
| 1991 | 1 |
0.3%
|
|
| 1997 | 3 |
0.9%
|
|
| 1998 | 3 |
0.9%
|
|
| 1999 | 2 |
0.6%
|
|
| 2000 | 19 |
5.7%
|
|
| 2001 | 10 |
3%
|
|
| 2002 | 6 |
1.8%
|
|
| 2003 | 18 |
5.4%
|
|
| 2004 | 14 |
4.2%
|
|
| 2005 | 22 |
6.6%
|
|
| 2006 | 8 |
2.4%
|
|
| 2007 | 18 |
5.4%
|
|
| 2008 | 34 |
10.3%
|
|
| 2009 | 41 |
12.4%
|
|
| 2010 | 35 |
10.6%
|
|
| 2011 | 35 |
10.6%
|
|
| 2012 | 52 |
15.7%
|
|
| 2013 | 8 |
2.4%
|
|
| Sysmiss | 1394 |