| Value | Category | Cases | |
|---|---|---|---|
| 1959 | 390 |
1.6%
|
|
| 1960 | 845 |
3.6%
|
|
| 1961 | 670 |
2.8%
|
|
| 1962 | 834 |
3.5%
|
|
| 1963 | 840 |
3.5%
|
|
| 1964 | 890 |
3.8%
|
|
| 1965 | 657 |
2.8%
|
|
| 1966 | 603 |
2.5%
|
|
| 1967 | 705 |
3%
|
|
| 1968 | 833 |
3.5%
|
|
| 1969 | 874 |
3.7%
|
|
| 1970 | 981 |
4.1%
|
|
| 1971 | 708 |
3%
|
|
| 1972 | 954 |
4%
|
|
| 1973 | 825 |
3.5%
|
|
| 1974 | 938 |
4%
|
|
| 1975 | 892 |
3.8%
|
|
| 1976 | 973 |
4.1%
|
|
| 1977 | 826 |
3.5%
|
|
| 1978 | 715 |
3%
|
|
| 1979 | 876 |
3.7%
|
|
| 1980 | 1004 |
4.2%
|
|
| 1981 | 764 |
3.2%
|
|
| 1982 | 862 |
3.6%
|
|
| 1983 | 821 |
3.5%
|
|
| 1984 | 733 |
3.1%
|
|
| 1985 | 676 |
2.9%
|
|
| 1986 | 607 |
2.6%
|
|
| 1987 | 459 |
1.9%
|
|
| 1988 | 322 |
1.4%
|
|
| 1989 | 279 |
1.2%
|
|
| 1990 | 166 |
0.7%
|
|
| 1991 | 105 |
0.4%
|
|
| 1992 | 51 |
0.2%
|
|
| 1993 | 12 |
0.1%
|
|
| 1994 | 1 |
0%
|
|
| 9998 | dk | 25 |
0.1%
|