The Cook County Board of Review, the body responsible for property tax appeals, saw its highest volume of appeals in the board’s history, Commissioner Michael Cabonargi (D) said at a roughly 30 minute budget hearing appearance Wednesday: 476,000 parcels during the Chicago triennial this past year, beating the 2009 peak of 439,000. The 2015 appeal spike increase is directly related to the property tax increase enacted in Chicago, fellow Commissioner Larry Rogers, Jr. (D) said, and has been expected by appeal-watchers. 50,178 individual taxpayers appealed, and 64.1% were successful in 2015, according to Board of Review data.