| Value |
Category |
| 1 |
On pre-designated registers |
| 2 |
On plain paper sheet |
| 3 |
On diary/notebook |
| 4 |
On computer |
| 5 |
Other |
| 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.