| Value | Category | Cases | |
|---|---|---|---|
| 1 | Below ½ of production | 2990 |
27.5%
|
| 2 | ½ of production | 830 |
7.6%
|
| 3 | above ½ of production | 6970 |
64.2%
|
| 9 | NA | 73 |
0.7%
|
| Sysmiss | 9183 |