| Value | Category | Cases | |
|---|---|---|---|
| 1 | wood/straw | 6 |
1%
|
| 2 | propane gas | 28 |
4.8%
|
| 4 | Charcoal | 552 |
93.9%
|
| 97 | Other, specify | 1 |
0.2%
|
| 98 | Don't know/Not sure | 1 |
0.2%
|