| Value | Category | Cases | |
|---|---|---|---|
| 0 | No data from individual questionnaire | 1238 |
49.5%
|
| 1 | Month and year | 1192 |
47.7%
|
| 2 | Month and age -y imp | 1 |
0%
|
| 3 | Year and age - m imp | 66 |
2.6%
|
| 4 | Y & age - y ignored | 0 |
0%
|
| 5 | Year - a, m imp | 0 |
0%
|
| 6 | Age - y, m imp | 2 |
0.1%
|
| 7 | Month - a, y imp | 0 |
0%
|
| 8 | None - all imp | 0 |
0%
|
| Sysmiss | 6558 |