| Value | Category | Cases | |
|---|---|---|---|
| 1949 | 1 |
0.8%
|
|
| 1950 | 2 |
1.6%
|
|
| 1951 | 2 |
1.6%
|
|
| 1953 | 1 |
0.8%
|
|
| 1954 | 2 |
1.6%
|
|
| 1955 | 2 |
1.6%
|
|
| 1957 | 1 |
0.8%
|
|
| 1959 | 2 |
1.6%
|
|
| 1960 | 2 |
1.6%
|
|
| 1961 | 6 |
4.8%
|
|
| 1962 | 1 |
0.8%
|
|
| 1963 | 2 |
1.6%
|
|
| 1964 | 5 |
4%
|
|
| 1966 | 1 |
0.8%
|
|
| 1967 | 1 |
0.8%
|
|
| 1968 | 3 |
2.4%
|
|
| 1969 | 6 |
4.8%
|
|
| 1970 | 9 |
7.3%
|
|
| 1971 | 6 |
4.8%
|
|
| 1972 | 10 |
8.1%
|
|
| 1973 | 6 |
4.8%
|
|
| 1974 | 5 |
4%
|
|
| 1975 | 3 |
2.4%
|
|
| 1976 | 4 |
3.2%
|
|
| 1977 | 1 |
0.8%
|
|
| 1979 | 4 |
3.2%
|
|
| 1980 | 3 |
2.4%
|
|
| 1981 | 1 |
0.8%
|
|
| 1983 | 1 |
0.8%
|
|
| 1984 | 1 |
0.8%
|
|
| 1989 | 5 |
4%
|
|
| 1990 | 4 |
3.2%
|
|
| 1991 | 4 |
3.2%
|
|
| 1992 | 2 |
1.6%
|
|
| 1993 | 1 |
0.8%
|
|
| 1994 | 2 |
1.6%
|
|
| 1997 | 1 |
0.8%
|
|
| 1998 | 1 |
0.8%
|
|
| 2001 | 1 |
0.8%
|
|
| 2004 | 1 |
0.8%
|
|
| 2006 | 1 |
0.8%
|
|
| 9999 | 9999. Don't know | 7 |
5.6%
|
| Sysmiss | 875 |