| Value |
Category |
| 100 |
Days, zero |
| 101 |
Days, one |
| 199 |
Days, missing |
| 201 |
Months, one |
| 301 |
Years, one |
| 997 |
Inconsistent |
| 998 |
Don't know |
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.