By The Associated PressRATES DOWN: Unemployment rates fell in 22 U.S. states in February from January. They rose in 12 and were unchanged in 16, the Labor Department said Friday. HIRING UP: Nationally, employers have added 200,000 jobs a month since February, double the rate from last spring. ON THE MEND: States hit hardest in the recession are seeing big drops in unemployment. Nevada's unemployment rate fell to 9.6 percent from 11.8 percent in February 2012, California's to 9.6 percent from 10.8 percent and Florida's to 7.7 percent from 9 percent.