| Value | Category | Cases | |
|---|---|---|---|
| 1 | 75% drift reduction | 22 |
8.8%
|
| 2 | other. specify: | 85 |
33.9%
|
| 3 | 90% drift reduction | 143 |
57%
|
| 4 | 50% drift reduction | 1 |
0.4%
|
| Sysmiss | 203 |