| Value | Category |
|---|---|
| 1 | Continuous supply of service daily |
| 2 | Service to supply an average of one aday aweek |
| 3 | Service to supply an average of two days a week |
| 4 | Service to supply an average of 3-4 days per weeks |
| 5 | Service to supply an average of one day every two weeks |
| 6 | service to supply an average of less than reported |