| Value |
Category |
| 1974 |
|
| 1985 |
|
| 1987 |
|
| 1988 |
|
| 1991 |
|
| 1992 |
|
| 1993 |
|
| 1994 |
|
| 1995 |
|
| 1997 |
|
| 1998 |
|
| 1999 |
|
| 2001 |
|
| 2002 |
|
| 8888 |
do not 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.
