| Value | Category | Cases | |
|---|---|---|---|
| 1954 | 1 |
9.1%
|
|
| 1956 | 1 |
9.1%
|
|
| 1957 | 1 |
9.1%
|
|
| 1958 | 2 |
18.2%
|
|
| 1961 | 1 |
9.1%
|
|
| 1965 | 1 |
9.1%
|
|
| 1967 | 1 |
9.1%
|
|
| 1972 | 1 |
9.1%
|
|
| 1975 | 1 |
9.1%
|
|
| 1992 | 1 |
9.1%
|
|
| Sysmiss | 727 |