Two of the city’s five fire trucks are costing it an increasing amount of money each year to keep up with needed repairs, fire Chief Ken Nussle said Wednesday. Having a plan to eventually replace the vehicles is one reason why he supports making the five-year, 0.5 percent income tax increase permanent. The administration this week began working to convince city council to allow voters to decide whether the 2016 tax hike should be permanent. Administration officials are hoping council will pass a resolution supporting the change before mid-December so the resolution may be turned over to the Trumbull County Board of Elections, allowing residents the chance to vote during the March 17 primary election. Nussle said the trucks are needing an increasing amount of repairs just to keep them functioning and available to battle fires within city limits.