| Value | Category | Cases | |
|---|---|---|---|
| 1900 | 1 |
16.7%
|
|
| 1977 | 1 |
16.7%
|
|
| 1995 | 1 |
16.7%
|
|
| 2005 | 1 |
16.7%
|
|
| 2008 | 1 |
16.7%
|
|
| 9998 | don't know | 1 |
16.7%
|
| Sysmiss | 44608 |