| Value |
Category |
| 1 |
Control_Noinfo |
| 2 |
Control_Info |
| 3 |
Free_Noinfo |
| 4 |
Free_Info |
| 5 |
Twentylev_Noinfo |
| 6 |
Twentylev_Info |
| 7 |
Sevenlev_Noinfo |
| 8 |
Sevenlev_Info |
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.