| Value | Category | Cases | |
|---|---|---|---|
| -99 | -99 (don't know) | 1 |
0.1%
|
| -66 | -66 (refuse to answer) | 0 |
0%
|
| 1 | Hilltop (upland) | 120 |
10.8%
|
| 2 | Hillside (upland) | 114 |
10.3%
|
| 3 | Hill foot (upland) | 75 |
6.7%
|
| 4 | Flat upland | 613 |
55.1%
|
| 5 | Swamp (lowland) | 142 |
12.8%
|
| 6 | Both upland and lowland | 47 |
4.2%
|
| Sysmiss | 4 |