| Value | Category | Cases | |
|---|---|---|---|
| 1949 | 1 |
0.2%
|
|
| 1966 | 1 |
0.2%
|
|
| 1968 | 1 |
0.2%
|
|
| 1970 | 2 |
0.5%
|
|
| 1975 | 2 |
0.5%
|
|
| 1976 | 3 |
0.7%
|
|
| 1978 | 1 |
0.2%
|
|
| 1979 | 2 |
0.5%
|
|
| 1980 | 4 |
0.9%
|
|
| 1981 | 1 |
0.2%
|
|
| 1983 | 2 |
0.5%
|
|
| 1984 | 1 |
0.2%
|
|
| 1985 | 4 |
0.9%
|
|
| 1986 | 4 |
0.9%
|
|
| 1987 | 5 |
1.2%
|
|
| 1988 | 2 |
0.5%
|
|
| 1989 | 5 |
1.2%
|
|
| 1990 | 8 |
1.9%
|
|
| 1991 | 1 |
0.2%
|
|
| 1992 | 4 |
0.9%
|
|
| 1993 | 4 |
0.9%
|
|
| 1994 | 5 |
1.2%
|
|
| 1995 | 7 |
1.6%
|
|
| 1996 | 8 |
1.9%
|
|
| 1997 | 15 |
3.5%
|
|
| 1998 | 12 |
2.8%
|
|
| 1999 | 25 |
5.9%
|
|
| 2000 | 23 |
5.4%
|
|
| 2001 | 16 |
3.8%
|
|
| 2002 | 19 |
4.5%
|
|
| 2003 | 10 |
2.4%
|
|
| 2004 | 23 |
5.4%
|
|
| 2005 | 33 |
7.8%
|
|
| 2006 | 70 |
16.5%
|
|
| 2007 | 16 |
3.8%
|
|
| 9995 | missing | 0 |
0%
|
| 9997 | refused | 0 |
0%
|
| 9998 | dont know | 68 |
16%
|
| 9999 | not applicable | 17 |
4%
|
| Sysmiss | 5466 |