| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, never | 145715 |
87.3%
|
| 2 | Yes, once | 15310 |
9.2%
|
| 3 | Yes, twice or more | 5899 |
3.5%
|
| 7 | N/A | 345549 | |
| 8 | Invalid | 308 | |
| 9 | Miss | 3177 |