| Value | Category | Cases | |
|---|---|---|---|
| 0 | No data from individual questionnaire | 75028 |
47.8%
|
| 1 | Month and year | 69570 |
44.4%
|
| 2 | Month and age -y imp | 103 |
0.1%
|
| 3 | Year and age - m imp | 9914 |
6.3%
|
| 4 | Y & age - y ignored | 0 |
0%
|
| 5 | Year - a, m imp | 0 |
0%
|
| 6 | Age - y, m imp | 1981 |
1.3%
|
| 7 | Month - a, y imp | 141 |
0.1%
|
| 8 | None - all imp | 72 |
0%
|
| Sysmiss | 23 |