While other government revenues are in a state of recession-influenced flux, tax revenues from Gainesville’s tourism industry have continued to climb since 2008, officials say. Revenues from the city’s hotel-motel tax, a 6 percent tax charged on top of visitors’ bills in the city’s hotels and motels, have grown by more than 28 percent in a five-year time frame for Gainesville. Gainesville’s keeper of the purse, Administrative Services Director Melody Marlowe, attributes the change to two things: The city’s number of hotels has grown in recent years — from 11 hotels to 13 in 2010 — and so has its “local tourism economy,” she said.