| Value |
Category |
| 1 |
Arsenic |
| 1 2 |
|
| 1 2 3 |
|
| 1 2 3 4 |
|
| 1 2 4 |
|
| 1 3 |
|
| 1 3 4 |
|
| 1 3 97 |
|
| 1 4 |
|
| 2 |
Iron |
| 2 3 |
|
| 3 |
Salinity |
| 3 4 |
|
| 4 |
Bacteria |
| 97 |
Other |
| 98 |
Don't Know |
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.