Year Percent 1999-01-01 0.92474100000000000 2000-01-01 0.71680600000000000 2001-01-01 0.48064700000000005 2002-01-01 0.46409399999999995 2003-01-01 0.58125500000000000 2004-01-01 0.75773800000000000 2005-01-01 1.23827000000000000 2006-01-01 1.54539000000000000 2007-01-01 9.92075000000000000 2008-01-01 4.42289000000000000 2009-01-01 113.91300000000000000 2010-01-01 229.87599999999998000 2011-01-01 148.82600000000000000 2012-01-01 163.31300000000000000 2013-01-01 178.93700000000000000 2014-01-01 142.76000000000000000 2015-01-01 191.23300000000000000