| Value | Category | Cases | |
|---|---|---|---|
| 98 | Don't know | 0 |
0%
|
| 998 | Don't know | 0 |
0%
|
| 1992 | 1 |
0.2%
|
|
| 1995 | 3 |
0.6%
|
|
| 1996 | 9 |
1.9%
|
|
| 1997 | 3 |
0.6%
|
|
| 1998 | 11 |
2.4%
|
|
| 1999 | 5 |
1.1%
|
|
| 2000 | 14 |
3%
|
|
| 2001 | 13 |
2.8%
|
|
| 2002 | 15 |
3.2%
|
|
| 2003 | 28 |
6%
|
|
| 2004 | 27 |
5.8%
|
|
| 2005 | 25 |
5.4%
|
|
| 2006 | 36 |
7.7%
|
|
| 2007 | 47 |
10.1%
|
|
| 2008 | 43 |
9.2%
|
|
| 2009 | 57 |
12.2%
|
|
| 2010 | 72 |
15.4%
|
|
| 2011 | 37 |
7.9%
|
|
| 2012 | 17 |
3.6%
|
|
| 9998 | Don't know | 4 |
0.9%
|
| Sysmiss | 1072 |