| Value | Category | Cases | |
|---|---|---|---|
| 0 | 130 |
9.3%
|
|
| 1 | Once | 955 |
68.2%
|
| 2 | Several times | 244 |
17.4%
|
| d | DK | 66 |
4.7%
|
| r | RF | 5 |
0.4%
|