ALBANY — Capital Region industrial development agencies were among the state’s most generous with tax exemptions, according to the state Comptroller’s Office.The comptroller’s annual IDA report also found that the Capital Region IDAs were some of the most frugal on their own operations, with among the lowest ratios of expenses per project.“This report gives taxpayers a clear look at the financial and project data as reported by IDAs for their communities,” state Comptroller Thomas DiNapoli said in a message accompanying the report, which covers the 2020 fiscal year.“IDAs can play an important role in helping local economies and businesses expand…