| Value |
Category |
| 1 |
Less than 1 year |
| 2 |
1 to 3 years |
| 3 |
4 to 10 years |
| 4 |
10 to 20 years |
| 5 |
Many generations |
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.