| Value |
Category |
| 1 |
Every year or less |
| 2 |
Between 1 and 3 years |
| 3 |
After 3 or more years |
| 4 |
Ad hoc |
| 5 |
No increase |
| 8 |
Don't know |
| 11 |
.A |
| 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.