| Value | Category | Cases | |
|---|---|---|---|
| 1 | Do not know | 1084 |
50%
|
| 1913 | 6 |
0.3%
|
|
| 1961 | 2 |
0.1%
|
|
| 1970 | 1 |
0%
|
|
| 1971 | 3 |
0.1%
|
|
| 1975 | 4 |
0.2%
|
|
| 1976 | 6 |
0.3%
|
|
| 1979 | 20 |
0.9%
|
|
| 1980 | 20 |
0.9%
|
|
| 1981 | 12 |
0.6%
|
|
| 1982 | 4 |
0.2%
|
|
| 1983 | 8 |
0.4%
|
|
| 1984 | 23 |
1.1%
|
|
| 1985 | 12 |
0.6%
|
|
| 1986 | 18 |
0.8%
|
|
| 1987 | 5 |
0.2%
|
|
| 1988 | 8 |
0.4%
|
|
| 1989 | 18 |
0.8%
|
|
| 1990 | 10 |
0.5%
|
|
| 1991 | 8 |
0.4%
|
|
| 1993 | 13 |
0.6%
|
|
| 1994 | 4 |
0.2%
|
|
| 1995 | 10 |
0.5%
|
|
| 1996 | 16 |
0.7%
|
|
| 1997 | 5 |
0.2%
|
|
| 1998 | 10 |
0.5%
|
|
| 1999 | 16 |
0.7%
|
|
| 2000 | 17 |
0.8%
|
|
| 2001 | 20 |
0.9%
|
|
| 2002 | 24 |
1.1%
|
|
| 2003 | 15 |
0.7%
|
|
| 2004 | 36 |
1.7%
|
|
| 2005 | 18 |
0.8%
|
|
| 2006 | 38 |
1.8%
|
|
| 2007 | 91 |
4.2%
|
|
| 2008 | 75 |
3.5%
|
|
| 2009 | 83 |
3.8%
|
|
| 2010 | 122 |
5.6%
|
|
| 2011 | 68 |
3.1%
|
|
| 2012 | 91 |
4.2%
|
|
| 2013 | 114 |
5.3%
|
|
| 2014 | 11 |
0.5%
|
|
| Sysmiss | 11899 |