| Value | Category | Cases | |
|---|---|---|---|
| -999 | -999 | 2 |
0.1%
|
| -888 | -888 | 9 |
0.3%
|
| 1 | Daily | 4 |
0.2%
|
| 2 | Weekly | 42 |
1.6%
|
| 3 | Montly | 1631 |
61.2%
|
| 4 | Bi-monthly | 122 |
4.6%
|
| 5 | Quarterly | 221 |
8.3%
|
| 6 | Yearly | 22 |
0.8%
|
| 7 | Once a while | 610 |
22.9%
|
| Sysmiss | 949 |