John Carpenter

Kate Hiscock / Flickr Creative Commons

Oklahoma labor officials say the state's unemployment rate rose in every one of its 77 counties in May, a trend they say is not uncommon for the month.

Figures released on Tuesday show Sequoyah County in southeast Oklahoma had the highest unemployment rate of 9 percent in May, up from 8.2 percent in April. The lowest unemployment rate was in Roger Mills County in western Oklahoma at 2.2 percent, which was an increase from 1.8 percent in April.