| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | No,main sources is used solely all year | 2154 | 2199 |
79.9%
|
| 2 | Yes,used in conjunction with main source | 472 | 437 |
15.9%
|
| 3 | Yes,used when main source is not usable | 124 | 117 |
4.3%
|
| 9 | ND | 24 | 23 | |
| Sysmiss | 9 | 6 |