| Value | Category | Cases | |
|---|---|---|---|
| 1 | Weekly | 17 |
1.9%
|
| 2 | Monthly | 151 |
16.8%
|
| 3 | Once a term | 374 |
41.7%
|
| 4 | Half Yearly | 35 |
3.9%
|
| 5 | Yearly | 105 |
11.7%
|
| 6 | Ad hoc | 86 |
9.6%
|
| 8 | Other (specify) | 129 |
14.4%
|
| Sysmiss | 216 |