| Value | Category | Cases | |
|---|---|---|---|
| 1 | EVERY 3 MONTHS | 599 |
13.5%
|
| 2 | EVERY 6 MONTHS | 616 |
13.9%
|
| 3 | EVERY YEAR | 802 |
18.1%
|
| 4 | EVERY TWO YEARS | 549 |
12.4%
|
| 5 | NEVER | 727 |
16.4%
|
| 6 | EVERY MONTH | 108 |
2.4%
|
| 7 | EVERY 2 MONTHS | 428 |
9.7%
|
| 8 | LESS THAN EVERY 2 YEARS | 176 |
4%
|
| 9 | MORE THAN ONCE A MONTH | 269 |
6.1%
|
| 96 | OTHER | 158 |
3.6%
|
| Sysmiss | 368 |