Revenues from the state’s 18 casinos increased 1.7 percent to nearly $314 million, according to a report from the Iowa Legislative Services Agency. The biggest share of the gaming revenues comes from taxes on table games and slot machines. Revenues from the state wagering taxes were $288 million, a 1.9 percent increase from fiscal 2014, according to the report. The state also received $5 million in installment payments on licenses for new casinos. The fee can be paid over five years. The increase in wagering taxes corresponds to a 3.5 percent increase in admissions to 729,000 and a 1.9 percent increase $27 million in total adjusted gross revenues, according to the report.