| Value | Category | Cases | |
|---|---|---|---|
| 1 | Once | 857 |
89.8%
|
| 2 | Twice | 87 |
9.1%
|
| 3 | Three times | 6 |
0.6%
|
| 4 | Four times or more | 2 |
0.2%
|
| 98 | Don’t know | 2 |
0.2%
|
| Sysmiss | 41058 |