Iowa's seasonally adjusted unemployment rate for January remained at 5 percent, while the December rate was revised upward to 5 percent from 4.9 percent, bringing the average annual unemployment rate to 5.2 percent, Iowa Workforce Development said today. In January 2012, the rate was 5.4 percent. The U.S. unemployment rate inched up slightly in January to 7.9 percent from 7.8 percent in December.