| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
21.4%
|
| 1974 | 1 |
7.1%
|
|
| 1985 | 1 |
7.1%
|
|
| 1995 | 2 |
14.3%
|
|
| 2003 | 1 |
7.1%
|
|
| 2010 | 1 |
7.1%
|
|
| 2011 | 1 |
7.1%
|
|
| 2013 | 1 |
7.1%
|
|
| 2022 | 1 |
7.1%
|
|
| 2023 | 2 |
14.3%
|
|
| Sysmiss | 100 |