Idaho's unemployment rate dipped to 9.2 percent in August, down from 9.4 percent in July.  The state Department of Labor released the latest jobless numbers Friday.  While Idaho posted its lowest unemployment rate since May 2010, the agency says 70,000 workers were still without jobs last month. Camas County had the highest jobless rate at 16.9 percent, while the lowest was recorded in Owyhee County at 5.3 percent.  Nationwide, Idaho was among 12 states where the jobless rate decreased. The federal Labor Department reported Friday that unemployment rates increased in 26 other states and were unchanged in the remaining 12 states.  The national unemployment rate stayed at 9.1 percent for the second straight month.