| Value | Category |
|---|---|
| 0000 | NIU (not in universe) |
| 0048 | 48 |
| 0120 | 120 |
| 0240 | 240 |
| 0360 | 360 |
| 0480 | 480 |
| 0600 | 600 |
| 0720 | 720 |
| 0840 | 840 |
| 0960 | 960 |
| 1080 | 1080 |
| 1200 | 1200 |
| 1800 | 1800+ |
| 9992 | Included in electricity payment |
| 9993 | No charge or no gas used |
| 9997 | Gas included in rent or in condo fee |