| Value | Category | Cases | |
|---|---|---|---|
| 1 | approximately accurate | 127 |
63.5%
|
| 2 | estimate too high | 14 |
7%
|
| 3 | estimate too low | 25 |
12.5%
|
| 4 | don't know | 34 |
17%
|
| Sysmiss | 4737 |