04 - C - Year to Year Comparison2011 2012 2013 January 6 8 6 February 11 21 6 March 22 11 19 April 5 15 May 11 16 June 6 18 July 13 10 August 17 10 September 14 10 October 16 14 November 18 11 December 8 13 0 5 10 15 20 25 6 11 22 5 11 6 13 17 14 16 18 8 8 21 11 15 16 18 10 10 10 14 11 13 6 6 19 Scavenging Year over Year Comparison 2011 2012 2013