Year Percent 1994-01-01 0.15803399999999998 1995-01-01 0.12791600000000000 1996-01-01 2.80932000000000000 1997-01-01 2.84115000000000000 1998-01-01 3.04809000000000000 1999-01-01 3.11931000000000000 2000-01-01 2.87122000000000000 2001-01-01 3.11688000000000000 2002-01-01 3.12016000000000000 2003-01-01 3.60532000000000000 2004-01-01 3.99326000000000000 2005-01-01 5.75202000000000000 2006-01-01 5.25843000000000100 2007-01-01 5.31210000000000000 2008-01-01 6.01720999999999950 2009-01-01 5.90215000000000000 2010-01-01 6.55202000000000000 2011-01-01 4.13311000000000000 2012-01-01 3.96645999999999970 2013-01-01 5.23855000000000000 2014-01-01 5.85405000000000000 2015-01-01 4.80269000000000000 2016-01-01 2.42678000000000000