| Value | Category | Cases | |
|---|---|---|---|
| 0 | Daily | 2 |
0%
|
| 1 | 15 days | 868 |
16.7%
|
| 2 | 1 month | 1726 |
33.1%
|
| 3 | 2 months | 638 |
12.2%
|
| 4 | A quarter | 530 |
10.2%
|
| 5 | Rarely | 1448 |
27.8%
|
| Sysmiss | 45174 |