| Value | Category | Cases | |
|---|---|---|---|
| -9 | NIU (not in universe) | 411 |
61.3%
|
| 1 | metres | 83 |
12.4%
|
| 2 | kilometres | 176 |
26.3%
|
| 9999995 | missing:impute | 0 |
0%
|