Value |
Category |
0 |
|
1 |
Taken before 12 months |
2 |
Between 12 to 24 months |
3 |
After 24 months |
4 |
No |
5 |
|
7 |
|
8 |
|
9 |
|
Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.