Iowa's unemployment rate fell to 4.7 percent in April, its lowest level since December 2008, Iowa Workforce Development said today. Unemployment was calculated at 4.9 percent in March and 5.2 percent a year ago. The number of people at work increased 8,800 to 1.57 million. Gains in manufacturing and some service industries were offset by losses in construction and government employment. The state lost 2,500 construction jobs last month and has seen employment in the sector drop by 3,600 over the last year. Manufacturers added 7,100 jobs April to April, leading the state in job growth. The U.S. unemployment rate for April eased down to 7.5 percent from 7.6 percent in March.