Year Percent 1994-01-01 0.20986100000000002 1995-01-01 0.18544200000000000 1996-01-01 0.36872100000000000 1997-01-01 0.94489300000000000 1998-01-01 0.93775000000000000 1999-01-01 1.49963999999999990 2000-01-01 0.96052800000000000 2001-01-01 0.81838300000000000 2002-01-01 0.54081400000000000 2003-01-01 0.31121300000000000 2004-01-01 0.59874200000000000 2005-01-01 0.41292299999999993 2006-01-01 0.91887900000000010 2007-01-01 1.28420000000000000 2008-01-01 1.26096000000000000 2009-01-01 0.91692800000000010 2010-01-01 0.83896100000000010 2011-01-01 0.70534100000000000 2012-01-01 0.70686500000000000 2013-01-01 0.67943800000000000 2014-01-01 1.81362000000000000 2015-01-01 1.86464000000000000 2016-01-01 1.97127000000000000