| Value |
Category |
| 5 |
None |
| 7 |
Can't remember |
| 9 |
Don't know/Didn't say |
| 1966 |
|
| 1970 |
|
| 1973 |
|
| 1975 |
|
| 1985 |
|
| 1987 |
|
| 1990 |
|
| 1995 |
|
| 1997 |
|
| 1998 |
|
| 1999 |
|
| 2000 |
|
| 2001 |
|
| 2003 |
|
| 2004 |
|
| 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.