Year Percent 1994-01-01 0.2370420000000000 1995-01-01 1.9035200000000000 1996-01-01 6.8067800000000010 1997-01-01 12.7719000000000000 1998-01-01 9.7373400000000000 1999-01-01 3.1033700000000000 2000-01-01 3.0680500000000000 2001-01-01 2.1693200000000000 2002-01-01 1.8320299999999998 2003-01-01 2.2730300000000000 2004-01-01 4.7624800000000000 2005-01-01 4.4126900000000004 2006-01-01 4.1839200000000000 2007-01-01 3.8272100000000000 2008-01-01 2.6556900000000003 2009-01-01 4.8475500000000000 2010-01-01 4.9489000000000000 2011-01-01 4.8272000000000000 2012-01-01 5.2107100000000000 2013-01-01 5.3348300000000000 2014-01-01 3.0853400000000000 2015-01-01 5.3091300000000010 2016-01-01 7.8248100000000000