| Value | Category | Cases | |
|---|---|---|---|
| 1968 | 264 |
0.9%
|
|
| 1969 | 482 |
1.6%
|
|
| 1970 | 559 |
1.8%
|
|
| 1971 | 563 |
1.8%
|
|
| 1972 | 692 |
2.3%
|
|
| 1973 | 633 |
2.1%
|
|
| 1974 | 672 |
2.2%
|
|
| 1975 | 645 |
2.1%
|
|
| 1976 | 637 |
2.1%
|
|
| 1977 | 669 |
2.2%
|
|
| 1978 | 696 |
2.3%
|
|
| 1979 | 731 |
2.4%
|
|
| 1980 | 809 |
2.6%
|
|
| 1981 | 737 |
2.4%
|
|
| 1982 | 775 |
2.5%
|
|
| 1983 | 809 |
2.6%
|
|
| 1984 | 824 |
2.7%
|
|
| 1985 | 900 |
2.9%
|
|
| 1986 | 788 |
2.6%
|
|
| 1987 | 810 |
2.6%
|
|
| 1988 | 823 |
2.7%
|
|
| 1989 | 915 |
3%
|
|
| 1990 | 1074 |
3.5%
|
|
| 1991 | 881 |
2.9%
|
|
| 1992 | 939 |
3.1%
|
|
| 1993 | 1037 |
3.4%
|
|
| 1994 | 1099 |
3.6%
|
|
| 1995 | 1048 |
3.4%
|
|
| 1996 | 1093 |
3.6%
|
|
| 1997 | 1200 |
3.9%
|
|
| 1998 | 1192 |
3.9%
|
|
| 1999 | 1255 |
4.1%
|
|
| 2000 | 1327 |
4.3%
|
|
| 2001 | 1312 |
4.3%
|
|
| 2002 | 1322 |
4.3%
|
|
| 2003 | 446 |
1.5%
|
|
| 9998 | DK | 1 |
0%
|
| 9999 | NO RESPONSE | 1 |
0%
|
| Sysmiss | 400 |