More people in all 10 metropolitan areas in Virginia were unemployed in May than in April, according to a report on joblessness released yesterday. The jobless rate in the Richmond area rose to 8.1 percent in May from 7.5 percent in April, more than double what it was a year ago, according to the Virginia Employment Commission. Seven cities in Virginia, including Richmond, Hopewell, Petersburg and Williamsburg, had double-digit unemployment rates in May.