| Value |
Category |
| -99 |
-99.Observation not possible |
| -55 |
-55.Missing |
| 1 |
1.Ash |
| 2 |
2.Mud |
| 3 |
3.Ash and Mud |
| 4 |
4.Neither observed |
| 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.