| Value | Category | Cases | |
|---|---|---|---|
| 97 | Refused | 0 |
0%
|
| 98 | Don't know | 2 |
0.6%
|
| 99 | Missing | 16 |
4.6%
|
| 1952 | 1 |
0.3%
|
|
| 1975 | 1 |
0.3%
|
|
| 1980 | 1 |
0.3%
|
|
| 1981 | 1 |
0.3%
|
|
| 1983 | 1 |
0.3%
|
|
| 1984 | 1 |
0.3%
|
|
| 1986 | 1 |
0.3%
|
|
| 1988 | 1 |
0.3%
|
|
| 1991 | 3 |
0.9%
|
|
| 1992 | 2 |
0.6%
|
|
| 1993 | 5 |
1.4%
|
|
| 1994 | 6 |
1.7%
|
|
| 1995 | 8 |
2.3%
|
|
| 1996 | 2 |
0.6%
|
|
| 1997 | 7 |
2%
|
|
| 1998 | 4 |
1.2%
|
|
| 1999 | 3 |
0.9%
|
|
| 2000 | 24 |
7%
|
|
| 2001 | 13 |
3.8%
|
|
| 2002 | 14 |
4.1%
|
|
| 2003 | 7 |
2%
|
|
| 2004 | 13 |
3.8%
|
|
| 2005 | 12 |
3.5%
|
|
| 2006 | 18 |
5.2%
|
|
| 2007 | 19 |
5.5%
|
|
| 2008 | 20 |
5.8%
|
|
| 2009 | 37 |
10.7%
|
|
| 2010 | 33 |
9.6%
|
|
| 2011 | 25 |
7.2%
|
|
| 2012 | 34 |
9.9%
|
|
| 2013 | 10 |
2.9%
|
|
| Sysmiss | 1380 |