| Value | Category | Cases | |
|---|---|---|---|
| 98 | Don't know | 0 |
0%
|
| 998 | Don't know | 0 |
0%
|
| 1989 | 1 |
0.2%
|
|
| 1991 | 1 |
0.2%
|
|
| 1992 | 4 |
0.9%
|
|
| 1993 | 2 |
0.5%
|
|
| 1994 | 2 |
0.5%
|
|
| 1995 | 3 |
0.7%
|
|
| 1996 | 8 |
1.8%
|
|
| 1997 | 6 |
1.4%
|
|
| 1998 | 8 |
1.8%
|
|
| 1999 | 11 |
2.5%
|
|
| 2000 | 10 |
2.3%
|
|
| 2001 | 17 |
3.9%
|
|
| 2002 | 10 |
2.3%
|
|
| 2003 | 19 |
4.4%
|
|
| 2004 | 27 |
6.2%
|
|
| 2005 | 46 |
10.6%
|
|
| 2006 | 37 |
8.5%
|
|
| 2007 | 65 |
14.9%
|
|
| 2008 | 51 |
11.7%
|
|
| 2009 | 40 |
9.2%
|
|
| 2010 | 28 |
6.4%
|
|
| 2011 | 14 |
3.2%
|
|
| 2012 | 2 |
0.5%
|
|
| 9998 | Don't know | 23 |
5.3%
|
| 9999 | Missing | 0 |
0%
|
| 99998 | Don't know | 0 |
0%
|
| Sysmiss | 1275 |