Year Percent 1992-01-01 6.99978000000000000 1993-01-01 12.99010000000000000 1994-01-01 11.34000000000000000 1995-01-01 7.18465000000000000 1996-01-01 5.86201999999999900 1997-01-01 5.72548000000000000 1998-01-01 6.40845000000000000 1999-01-01 5.71774000000000000 2000-01-01 4.42159000000000000 2001-01-01 4.64679000000000000 2002-01-01 2.45277000000000000 2003-01-01 2.14320000000000000 2004-01-01 1.65062999999999980 2005-01-01 1.29178000000000000 2006-01-01 3.39339000000000000 2007-01-01 0.31540799999999997 2008-01-01 0.25232500000000000 2009-01-01 0.30976900000000000 2010-01-01 0.16609700000000000 2011-01-01 0.51196900000000000 2012-01-01 0.36576300000000000 2013-01-01 0.91559400000000000 2014-01-01 1.24609000000000000 2015-01-01 1.73219000000000010 2016-01-01 2.20609000000000000