| Value |
Category |
| 1 |
Heredity |
| 2 |
Congenital |
| 3 |
At birth |
| 4 |
Dumb |
| 5 |
Contagion |
| 6 |
Envy, charm |
| 96 |
Other |
| 98 |
DK |
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.