Year Percent 1995-01-01 0.13621000000000000 1996-01-01 1.44023000000000000 1997-01-01 2.25680000000000000 1998-01-01 3.16836000000000000 1999-01-01 2.33000999999999970 2000-01-01 1.98790000000000000 2001-01-01 1.32171000000000000 2002-01-01 0.71538700000000000 2003-01-01 0.46311800000000003 2004-01-01 0.58714700000000000 2005-01-01 1.32641000000000000 2006-01-01 1.64462000000000000 2007-01-01 1.87915000000000000 2008-01-01 2.22946000000000000 2009-01-01 3.37653000000000030 2010-01-01 2.57010999999999970 2011-01-01 4.38755000000000000 2012-01-01 4.71972000000000000 2013-01-01 6.29413000000000000 2014-01-01 6.02954000000000000 2015-01-01 12.31840000000000000 2016-01-01 12.29630000000000000