| Value |
Category |
| 1 |
Not yet in use |
| 2 |
used by consortium only |
| 3 |
used by consortium and others |
| 4 |
used by others only |
| 5 |
don't know/can't remember |
| 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.