Beginning January 15, 2008, and annually thereafter, the department of natural resources shall submit a report to the governor and general assembly that describes the overall effectiveness of the decentralized emissions inspection program. Such report shall be based upon the latest available data, including data derived from EPA model analysis. The report shall contain an interpretative analysis detailing whether or not the ambient air quality achieved by the decentralized emissions inspection program exceeds the ambient air quality achieved by the current centralized emissions inspection program.