| Value | Category | Cases | |
|---|---|---|---|
| -9999 | inapplicable | 12780 |
98.3%
|
| -3 | non-response | 0 |
0%
|
| -2 | non response | 13 |
0.1%
|
| -1 | non response | 0 |
0%
|
| 1960 | 1 |
0%
|
|
| 1970 | 1 |
0%
|
|
| 1972 | 1 |
0%
|
|
| 1973 | 1 |
0%
|
|
| 1974 | 3 |
0%
|
|
| 1975 | 2 |
0%
|
|
| 1977 | 1 |
0%
|
|
| 1978 | 4 |
0%
|
|
| 1979 | 4 |
0%
|
|
| 1980 | 6 |
0%
|
|
| 1982 | 11 |
0.1%
|
|
| 1983 | 4 |
0%
|
|
| 1984 | 9 |
0.1%
|
|
| 1985 | 7 |
0.1%
|
|
| 1986 | 9 |
0.1%
|
|
| 1987 | 6 |
0%
|
|
| 1988 | 6 |
0%
|
|
| 1989 | 8 |
0.1%
|
|
| 1990 | 15 |
0.1%
|
|
| 1991 | 5 |
0%
|
|
| 1992 | 8 |
0.1%
|
|
| 1993 | 10 |
0.1%
|
|
| 1994 | 14 |
0.1%
|
|
| 1995 | 10 |
0.1%
|
|
| 1996 | 7 |
0.1%
|
|
| 1997 | 13 |
0.1%
|
|
| 1998 | 9 |
0.1%
|
|
| 1999 | 6 |
0%
|
|
| 2000 | 13 |
0.1%
|
|
| 2001 | 4 |
0%
|
|
| 2002 | 5 |
0%
|
|
| 2003 | 2 |
0%
|
|
| 2004 | 5 |
0%
|