| Value | Category | Cases | |
|---|---|---|---|
| -1 | missing | 0 |
0%
|
| 0 | never | 13296 |
27.7%
|
| 1 | once or twice | 2405 |
5%
|
| 2 | a few times | 1282 |
2.7%
|
| 3 | often | 1001 |
2.1%
|
| 7 | not applicable | 30044 |
62.5%
|
| 8 | refused | 12 |
0%
|
| 9 | don't know | 44 |
0.1%
|