| Value | Category | Cases | |
|---|---|---|---|
| 1 | Daily | 0 |
0%
|
| 2 | Weekly | 250 |
7.6%
|
| 3 | Monthly | 1040 |
31.4%
|
| 4 | Once a term | 1806 |
54.6%
|
| 5 | Never | 213 |
6.4%
|
| Sysmiss | 18 |