| Value |
Category |
| 1990 |
|
| 1991 |
|
| 1992 |
|
| 1993 |
|
| 1994 |
|
| 1995 |
|
| 1996 |
|
| 1997 |
|
| 1998 |
|
| 1999 |
|
| 2000 |
|
| 9997 |
Missing |
| 9999 |
Don't know |
| 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.
