Year Percent 1993-01-01 1.96597000000000000 1994-01-01 2.58038000000000000 1995-01-01 3.04201000000000000 1996-01-01 3.44503000000000050 1997-01-01 4.01954000000000000 1998-01-01 5.07358000000000100 1999-01-01 5.38366999999999950 2000-01-01 3.26618000000000000 2001-01-01 1.03694000000000000 2002-01-01 0.60813800000000000 2003-01-01 0.32615900000000003 2004-01-01 0.16153499999999998 2005-01-01 0.23461900000000000 2006-01-01 0.22511700000000000 2007-01-01 0.17704100000000000 2008-01-01 0.32430300000000000 2009-01-01 0.81004000000000000 2010-01-01 0.50120400000000000 2011-01-01 0.05568200000000000 2012-01-01 0.19437600000000000 2013-01-01 0.52926300000000000 2014-01-01 0.99790800000000000 2015-01-01 1.96853000000000000 2016-01-01 2.52522000000000000