Year Percent 1995-01-01 0.09827500000000000 1996-01-01 0.12900000000000000 1997-01-01 0.13112200000000002 1998-01-01 0.14155299999999998 1999-01-01 1.18942000000000010 2000-01-01 1.08352000000000000 2001-01-01 1.82428000000000000 2002-01-01 2.61902000000000000 2003-01-01 2.14344000000000000 2004-01-01 2.34524000000000000 2005-01-01 4.70518000000000000 2006-01-01 3.76597000000000000 2007-01-01 3.83576999999999970 2008-01-01 3.10798000000000000 2009-01-01 2.83270000000000000 2010-01-01 2.66583000000000000 2011-01-01 2.87040999999999970 2012-01-01 2.85601000000000000 2013-01-01 2.33692999999999970 2014-01-01 2.45391000000000000 2015-01-01 2.39280000000000000 2016-01-01 1.69842000000000000 2017-01-01 2.78143000000000000