Value | Category | Cases | |
---|---|---|---|
-2 | Refusal to answer | 0 |
0%
|
-1 | Don't know | 1 |
0.2%
|
1961 | 1 |
0.2%
|
|
1968 | 1 |
0.2%
|
|
1970 | 1 |
0.2%
|
|
1972 | 1 |
0.2%
|
|
1973 | 2 |
0.5%
|
|
1974 | 1 |
0.2%
|
|
1976 | 2 |
0.5%
|
|
1978 | 2 |
0.5%
|
|
1980 | 2 |
0.5%
|
|
1981 | 1 |
0.2%
|
|
1982 | 5 |
1.1%
|
|
1986 | 3 |
0.7%
|
|
1987 | 2 |
0.5%
|
|
1988 | 4 |
0.9%
|
|
1989 | 4 |
0.9%
|
|
1990 | 4 |
0.9%
|
|
1991 | 3 |
0.7%
|
|
1992 | 4 |
0.9%
|
|
1993 | 7 |
1.6%
|
|
1994 | 4 |
0.9%
|
|
1995 | 7 |
1.6%
|
|
1996 | 8 |
1.8%
|
|
1997 | 13 |
2.9%
|
|
1998 | 34 |
7.7%
|
|
1999 | 163 |
36.9%
|
|
2000 | 140 |
31.7%
|
|
2001 | 22 |
5%
|
|
Sysmiss | 2 |