| Value |
Category |
| 1 |
Never had one |
| 2 |
Less than 1 year |
| 3 |
1 year, less than 2 years ago |
| 4 |
2 to 3 years |
| 5 |
More than 3 years ago |
| 8 |
Does not know/Not sure |
| 9 |
Missing from the field |
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.
