Value | Category | Cases | |
---|---|---|---|
-9 | don't know | 2 |
0.3%
|
-8 | does not apply | 0 |
0%
|
-7 | refused to answer | 1 |
0.1%
|
1967 | 1 |
0.1%
|
|
1971 | 1 |
0.1%
|
|
1975 | 2 |
0.3%
|
|
1980 | 2 |
0.3%
|
|
1981 | 1 |
0.1%
|
|
1982 | 2 |
0.3%
|
|
1983 | 1 |
0.1%
|
|
1984 | 1 |
0.1%
|
|
1987 | 1 |
0.1%
|
|
1989 | 3 |
0.4%
|
|
1990 | 4 |
0.5%
|
|
1991 | 1 |
0.1%
|
|
1992 | 1 |
0.1%
|
|
1993 | 4 |
0.5%
|
|
1994 | 8 |
1.1%
|
|
1995 | 4 |
0.5%
|
|
1996 | 8 |
1.1%
|
|
1997 | 3 |
0.4%
|
|
1998 | 12 |
1.6%
|
|
1999 | 14 |
1.9%
|
|
2000 | 24 |
3.2%
|
|
2001 | 24 |
3.2%
|
|
2002 | 24 |
3.2%
|
|
2003 | 47 |
6.2%
|
|
2004 | 36 |
4.8%
|
|
2005 | 72 |
9.5%
|
|
2006 | 166 |
22%
|
|
2007 | 165 |
21.8%
|
|
2008 | 121 |
16%
|