Year Number 2008-01-01 661.2590489734180 2009-01-01 377.9363711352500 2010-01-01 237.6254606188930 2011-01-01 165.9599614434610 2012-01-01 177.6295911150820 2013-01-01 102.9435819784370 2014-01-01 84.9624946157325 2015-01-01 69.8078809930589