| Value | Category | Cases | |
|---|---|---|---|
| 0 | No data from individual questionnaire | 4 |
30.8%
|
| 1 | Month and year | 9 |
69.2%
|
| 2 | Month and age -y imp | 0 |
0%
|
| 3 | Year and age - m imp | 0 |
0%
|
| 4 | Y & age - y ignored | 0 |
0%
|
| 5 | Year - a, m imp | 0 |
0%
|
| 6 | Age - y, m imp | 0 |
0%
|
| 7 | Month - a, y imp | 0 |
0%
|
| 8 | None - all imp | 0 |
0%
|
| Sysmiss | 9044 |