| Value | Category | Cases | |
|---|---|---|---|
| 1 | Below ½ of production | 1685 |
15.5%
|
| 2 | ½ of production | 678 |
6.2%
|
| 3 | above ½ of production | 2446 |
22.5%
|
| 9 | NA | 6054 |
55.7%
|
| Sysmiss | 9183 |