| Value | Category | Cases | |
|---|---|---|---|
| 1 | Public supply | 4 |
16.7%
|
| 2 | Private source, external | 17 |
70.8%
|
| 3 | Private generator (own) | 1 |
4.2%
|
| 4 | Combination of private and public | 2 |
8.3%
|
| 99 | Missing | 0 |
0%
|
| Sysmiss | 1701 |