| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 |
0%
|
| 1919 | 1 |
1.5%
|
|
| 1946 | 1 |
1.5%
|
|
| 1953 | 1 |
1.5%
|
|
| 1956 | 2 |
2.9%
|
|
| 1959 | 1 |
1.5%
|
|
| 1960 | 2 |
2.9%
|
|
| 1962 | 1 |
1.5%
|
|
| 1964 | 1 |
1.5%
|
|
| 1965 | 1 |
1.5%
|
|
| 1966 | 2 |
2.9%
|
|
| 1967 | 2 |
2.9%
|
|
| 1968 | 1 |
1.5%
|
|
| 1970 | 1 |
1.5%
|
|
| 1972 | 2 |
2.9%
|
|
| 1973 | 1 |
1.5%
|
|
| 1974 | 3 |
4.4%
|
|
| 1975 | 1 |
1.5%
|
|
| 1976 | 1 |
1.5%
|
|
| 1977 | 1 |
1.5%
|
|
| 1978 | 2 |
2.9%
|
|
| 1979 | 1 |
1.5%
|
|
| 1980 | 6 |
8.8%
|
|
| 1981 | 1 |
1.5%
|
|
| 1982 | 1 |
1.5%
|
|
| 1984 | 2 |
2.9%
|
|
| 1985 | 2 |
2.9%
|
|
| 1987 | 2 |
2.9%
|
|
| 1988 | 3 |
4.4%
|
|
| 1989 | 3 |
4.4%
|
|
| 1990 | 2 |
2.9%
|
|
| 1993 | 2 |
2.9%
|
|
| 1994 | 2 |
2.9%
|
|
| 1995 | 1 |
1.5%
|
|
| 1997 | 2 |
2.9%
|
|
| 1999 | 1 |
1.5%
|
|
| 2002 | 2 |
2.9%
|
|
| 2003 | 3 |
4.4%
|
|
| 2006 | 1 |
1.5%
|
|
| 2007 | 1 |
1.5%
|
|
| 2008 | 1 |
1.5%
|
|
| 2009 | 1 |
1.5%
|
|
| Sysmiss | 6379 |