| Value | Category | Cases | |
|---|---|---|---|
| 1955 | 59 |
0.3%
|
|
| 1956 | 178 |
0.9%
|
|
| 1957 | 184 |
0.9%
|
|
| 1958 | 221 |
1.1%
|
|
| 1959 | 227 |
1.2%
|
|
| 1960 | 275 |
1.4%
|
|
| 1961 | 228 |
1.2%
|
|
| 1962 | 309 |
1.6%
|
|
| 1963 | 309 |
1.6%
|
|
| 1964 | 314 |
1.6%
|
|
| 1965 | 361 |
1.9%
|
|
| 1966 | 328 |
1.7%
|
|
| 1967 | 392 |
2%
|
|
| 1968 | 346 |
1.8%
|
|
| 1969 | 394 |
2%
|
|
| 1970 | 388 |
2%
|
|
| 1971 | 445 |
2.3%
|
|
| 1972 | 428 |
2.2%
|
|
| 1973 | 436 |
2.2%
|
|
| 1974 | 455 |
2.3%
|
|
| 1975 | 460 |
2.4%
|
|
| 1976 | 463 |
2.4%
|
|
| 1977 | 492 |
2.5%
|
|
| 1978 | 486 |
2.5%
|
|
| 1979 | 546 |
2.8%
|
|
| 1980 | 496 |
2.5%
|
|
| 1981 | 529 |
2.7%
|
|
| 1982 | 522 |
2.7%
|
|
| 1983 | 530 |
2.7%
|
|
| 1984 | 556 |
2.8%
|
|
| 1985 | 528 |
2.7%
|
|
| 1986 | 540 |
2.8%
|
|
| 1987 | 584 |
3%
|
|
| 1988 | 642 |
3.3%
|
|
| 1989 | 690 |
3.5%
|
|
| 1990 | 812 |
4.2%
|
|
| 1991 | 856 |
4.4%
|
|
| 1992 | 852 |
4.4%
|
|
| 1993 | 1052 |
5.4%
|
|
| 1994 | 993 |
5.1%
|
|
| 1995 | 573 |
2.9%
|
|
| 9998 | DK | 30 |
0.2%
|
| 9999 | Missing | 0 |
0%
|