| Value | Category | Cases | |
|---|---|---|---|
| 1 | Just before period begins | 3793 |
31.2%
|
| 2 | Right after period has ended | 5412 |
44.5%
|
| 3 | Half way between two periods | 2680 |
22%
|
| 6 | Other | 4 |
0%
|
| 8 | Don't Know | 271 |
2.2%
|
| Sysmiss | 9058 |