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 |
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.