| Value | Category | Cases | |
|---|---|---|---|
| 1 | 26 |
6.8%
|
|
| 2 | 20 |
5.3%
|
|
| 3 | 32 |
8.4%
|
|
| 4 | 22 |
5.8%
|
|
| 5 | 73 |
19.2%
|
|
| 7 | 36 |
9.5%
|
|
| fertilizers | 1 |
0.3%
|
|
| n/a | 157 |
41.3%
|
|
| no answer | 13 |
3.4%
|