It's difficult to find data about how much AZ spends which makes it difficult for residents to make intelligent choices when voting. Fortunately we should start getting better information here soon according to Sunshine Review: Arizona currently has no statewide, official spending database online. However, a database will be placed online on or before January 1, 2011.
Below is a graph of how much the state spends each year with the GDP included. Thanks to US Government Spending and the Goldwater Institute via AZ Rural Times for the information. The spending estimates are based on Goldwater Institute (from AZ Rural Times) numbers.