The state`s top utility regulator says Arkansas has done what it can to curb energy prices. Now, Public Service Commission chairman Sandra Hochstetter says utilities and customers need to work together on conservation programs. Hochstetter says efforts to use less energy should be as important as they were during the oil crisis years of the 1970s and 1980s. This winter, officials predict natural gas prices will be about 20 percent higher than last year. Between 60 percent and 80 percent of natural gas bills are for the cost of the gas itself. The PSC says the average monthly natural gas bill for 100 cubic feet this winter will be between $102.00 and $107.00, depending on the provider.