Wisconsin public libraries return $4.06 for every dollar taxpayers invest in them, according to an economic [1]impact research report produced by NorthStar Economics Inc. of Madison.

The research showed the total economic contribution of Wisconsin public libraries is more than $750 million every year.

Wisconsin public libraries serve a total state population of 5.6 million and in the past 10 years library visits have grown by 28 percent, the report states.