| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1. Impossible to read measurer/GPS due to field location | 73 |
55.7%
|
| 2 | 2. Unwillingness of the holder | 0 |
0%
|
| 3 | 3. Other(specify) | 58 |
44.3%
|
| Sysmiss | 14747 |