| Value | Category | Cases | |
|---|---|---|---|
| 0 | ! Not applicable ! | 167066 |
36.3%
|
| 1 | Local/compost | 228798 |
49.7%
|
| 2 | Mineral/chemical | 12220 |
2.7%
|
| 3 | Both | 52116 |
11.3%
|
| Sysmiss | 396188 |