| Value | Category | Cases | |
|---|---|---|---|
| 1954 | 1 |
1%
|
|
| 1966 | 1 |
1%
|
|
| 1977 | 1 |
1%
|
|
| 1978 | 2 |
2%
|
|
| 1979 | 1 |
1%
|
|
| 1980 | 1 |
1%
|
|
| 1981 | 3 |
2.9%
|
|
| 1982 | 1 |
1%
|
|
| 1983 | 2 |
2%
|
|
| 1985 | 3 |
2.9%
|
|
| 1986 | 1 |
1%
|
|
| 1988 | 2 |
2%
|
|
| 1989 | 3 |
2.9%
|
|
| 1990 | 5 |
4.9%
|
|
| 1991 | 4 |
3.9%
|
|
| 1993 | 3 |
2.9%
|
|
| 1994 | 3 |
2.9%
|
|
| 1995 | 1 |
1%
|
|
| 1996 | 2 |
2%
|
|
| 1997 | 1 |
1%
|
|
| 1998 | 7 |
6.9%
|
|
| 1999 | 3 |
2.9%
|
|
| 2000 | 5 |
4.9%
|
|
| 2001 | 3 |
2.9%
|
|
| 2002 | 6 |
5.9%
|
|
| 2003 | 5 |
4.9%
|
|
| 2004 | 4 |
3.9%
|
|
| 2005 | 6 |
5.9%
|
|
| 2006 | 6 |
5.9%
|
|
| 9998 | 9998. Refused | 2 |
2%
|
| 9999 | 9999. Don't Know | 14 |
13.7%
|
| Sysmiss | 897 |