| Value |
Category |
| 1 |
still in training |
| 2 |
1998 |
| 3 |
1997 |
| 4 |
1996 |
| 5 |
1995 |
| 6 |
1994 |
| 7 |
1993 or before |
| 9 |
no answer |
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.