| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 |
0%
|
| 1919 | 1 |
3.1%
|
|
| 1957 | 1 |
3.1%
|
|
| 1960 | 1 |
3.1%
|
|
| 1965 | 1 |
3.1%
|
|
| 1970 | 1 |
3.1%
|
|
| 1972 | 1 |
3.1%
|
|
| 1975 | 1 |
3.1%
|
|
| 1976 | 2 |
6.3%
|
|
| 1978 | 3 |
9.4%
|
|
| 1979 | 2 |
6.3%
|
|
| 1980 | 2 |
6.3%
|
|
| 1982 | 1 |
3.1%
|
|
| 1983 | 3 |
9.4%
|
|
| 1985 | 1 |
3.1%
|
|
| 1986 | 1 |
3.1%
|
|
| 1988 | 1 |
3.1%
|
|
| 1989 | 1 |
3.1%
|
|
| 1990 | 1 |
3.1%
|
|
| 1992 | 1 |
3.1%
|
|
| 1997 | 2 |
6.3%
|
|
| 2001 | 1 |
3.1%
|
|
| 2004 | 1 |
3.1%
|
|
| 2005 | 1 |
3.1%
|
|
| 2007 | 1 |
3.1%
|
|
| Sysmiss | 6415 |