| Value | Category | Cases | |
|---|---|---|---|
| 1 | Just before her period begins | 209 |
1.3%
|
| 2 | During her period | 137 |
0.9%
|
| 3 | Right after her period has ended | 8699 |
55.8%
|
| 4 | Halfway between two periods | 6117 |
39.2%
|
| 6 | Other | 71 |
0.5%
|
| 8 | Don't know | 357 |
2.3%
|
| Sysmiss | 5677 |