| Value | Category | Cases | |
|---|---|---|---|
| 1 | Use only | 78 |
40%
|
| 2 | Production only | 63 |
32.3%
|
| 3 | Both use and produce | 46 |
23.6%
|
| 98 | Don't know | 8 |
4.1%
|
| Sysmiss | 70441 |