| Value |
Category |
| 1 |
irreg |
| 2 |
irreg mth |
| 3 |
irreg mth wk |
| 4 |
irreg wk mth |
| 5 |
mth |
| 6 |
mth irreg |
| 7 |
wk |
| 8 |
wk irreg |
| 9 |
wk mth |
| 10 |
wk mth irreg |
| Missing value |
|
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.