| Value | Category | Cases | |
|---|---|---|---|
| 1 | Semanal? | 37 |
0.2%
|
| 2 | Mensual? | 213 |
0.9%
|
| 3 | Trimestral? | 1427 |
6.1%
|
| 4 | Semestral? | 3406 |
14.5%
|
| 5 | Anual? | 16032 |
68.3%
|
| 6 | Otra? | 2374 |
10.1%
|
| Sysmiss | 18784 |