| Value | Category | Cases | |
|---|---|---|---|
| 0 | 4 |
0.9%
|
|
| 1 | Monthly | 25 |
5.8%
|
| 2 | Quarterly | 339 |
78.1%
|
| 3 | Annually | 31 |
7.1%
|
| 4 | One off | 35 |
8.1%
|
| 5 | Don't know | 0 |
0%
|
| Sysmiss | 1680 |