| Value |
Category |
| 0 |
|
| 1 |
Yes |
| 2 |
No |
| 98 |
|
| 99 |
|
| 1987 |
|
| 1990 |
|
| 1992 |
|
| 1993 |
|
| 1994 |
|
| 1995 |
|
| 1996 |
|
| 1997 |
|
| 1998 |
|
| 1999 |
|
| 2000 |
|
| 2001 |
|
| 9999 |
|
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.