When we think of government corruption (as one tends to do),  our biased minds often gravitate to thoughts of military juntas and third world governments. But, of course, corruption is everywhere, in one form or another. And it's costing U.S. citizens big time.

A new study from researchers at the University of Hong Kong and Indiana University estimates that corruption on the state level is costing Americans in the 10 most corrupt states an average of $1,308 per year, or 5.2% of those states' average expenditures per year.

The researchers studied more than 25,000 convictions of public officials for violation of federal corruption laws between 1976 and 2008 as well as patterns in state spending to develop a corruption index that estimates the most and least corrupt states in the union. Based on this method, the the most corrupt states are: