| Value |
Category |
| 1 |
0-3 months |
| 2 |
2=3-6 months |
| 3 |
3=6-12 months |
| 4 |
4=1-2 years |
| 5 |
5=2-4 years |
| 6 |
6=4-6 years |
| 7 |
7=6-8 years |
| 8 |
8=8-10 years |
| 9 |
9=over 10 |
| 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.