| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every week | 1334 |
71.4%
|
| 2 | 1-3 times a month | 334 |
17.9%
|
| 3 | 1-2 times per term | 68 |
3.6%
|
| 4 | 1-2 times per year | 17 |
0.9%
|
| 5 | Never | 116 |
6.2%
|
| Sysmiss | 1180 |