Peoria County has the highest average annual wage increase of all large U.S. Counties.  The Bureau Of Labor Statistics says the average weekly wage increased nearly 19-percent in Peoria County from March of 2010 to March this year.  The average weekly wage among the largest U.S. Counties went up more than five-percent.  The report says professional and business services had the largest impact on Peoria County’s increase.  Heartland Partnership CEO Jim McConoughey says that means investments in attorneys, engineers and consultants support basic business growth.