Iowa’s economy is doing better than average, writes the Cedar Rapids Gazette according to a report from the state’s fiscal agency that shows Iowa leading neighboring states and the nation in economic growth over the past 20 years. The state equivalent of gross domestic product grew more than 50 percent between 1997 and 2017, the nonpartisan Legislative Services Agency reported Monday. The growth — $56.6 billion — puts Iowa 21st among the 50 states for comparable growth.