Year Percent 1994-01-01 9.54415000000000000 1995-01-01 2.75974000000000030 1996-01-01 3.58060000000000000 1997-01-01 3.18340000000000000 1998-01-01 4.97859000000000050 1999-01-01 3.48861999999999960 2000-01-01 2.55199000000000000 2001-01-01 3.67690000000000000 2002-01-01 3.41140000000000000 2003-01-01 3.38938000000000050 2004-01-01 2.58579000000000030 2005-01-01 1.85378000000000000 2006-01-01 2.03314000000000000 2007-01-01 2.36357000000000000 2008-01-01 2.46405000000000000 2009-01-01 2.52515000000000000 2010-01-01 2.49060999999999980 2011-01-01 1.55562000000000000 2012-01-01 0.40763200000000000 2013-01-01 0.30599699999999996 2014-01-01 0.50600700000000000 2015-01-01 0.67613300000000000 2016-01-01 0.62398300000000000