Metro Denver's unemployment rate stood at 5.2 percent in July, unchanged from June but down 1.5 percentage points from July 2013's 6.7 percent jobless rate, the U.S. Department of Labor reported Wednesday. The 5.2 percent jobless rate is for a 10-county area that includes Denver, Aurora, Lakewood, Broomfield and Centennial, but not Boulder County. The July 2014 numbers are preliminary and are not adjusted for typical seasonal job fluctuations, and so year-to-year comparisons are considered more…