| Value | Category | Cases | |
|---|---|---|---|
| 0 | no incentive | 219 |
24%
|
| 1 | non-monetary incentive | 237 |
26%
|
| 2 | monetary incentive | 221 |
24.2%
|
| 3 | monetary & non-monetary incentives | 235 |
25.8%
|