| Value | Category | Cases | |
|---|---|---|---|
| 1 | Use only | 129 |
34.3%
|
| 2 | Production only | 11 |
2.9%
|
| 3 | Both use and produce | 227 |
60.4%
|
| 98 | Don't know | 9 |
2.4%
|
| Sysmiss | 70260 |