| Value |
Category |
| ABOUT 4 YEARS |
|
| AFTER 40 DAYS |
|
| AFTER ONE YEAR |
|
| NAP |
|
| ONCE EVERY 2 YEARS |
|
| Question not asked |
|
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.
