| Value |
Category |
| 1 |
NO TT |
| 2 |
LESS THAN 1 YR |
| 3 |
1 YEAR |
| 4 |
2 YEARS |
| 5 |
3 YEARS |
| 6 |
MORE THAN 3 YRS |
| 9 |
OMITTED |
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.