| Value |
Category |
| 1 |
Does not operate yet |
| 2 |
Operates for less then 12 months |
| 3 |
Operates from 1 to 2 years |
| 4 |
Operates for more then 2 years |
| 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.