Year Percent 1995-01-01 31.812900000000000 1996-01-01 67.526600000000000 1997-01-01 113.855000000000000 1998-01-01 69.889700000000000 1999-01-01 62.215400000000000 2000-01-01 96.393500000000000 2001-01-01 41.033000000000000 2002-01-01 46.919000000000000 2003-01-01 56.945000000000000 2004-01-01 56.350200000000000 2005-01-01 43.302000000000000 2006-01-01 21.705700000000000 2007-01-01 21.781000000000000 2008-01-01 16.403500000000000 2009-01-01 13.724600000000000 2010-01-01 13.598800000000000 2011-01-01 7.963210000000001 2012-01-01 10.261400000000000 2013-01-01 6.608100000000000 2014-01-01 6.645370000000000 2015-01-01 1.708160000000000