| Value |
Category |
| 0 |
0. Invalid Code |
| 888 |
888. Not applicable |
| 999 |
999. Unspecified |
| 8888 |
8888. Not applicable |
| 9999 |
9999. Unspecified |
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.