| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, never | 147364 |
88.3%
|
| 2 | Yes, once | 13253 |
7.9%
|
| 3 | Yes, twice or more | 6222 |
3.7%
|
| 7 | N/A | 345548 | |
| 8 | Invalid | 204 | |
| 9 | Miss | 3367 |