Year Percent 1985-01-01 0.0017260000000000000 1986-01-01 0.0017010000000000003 1987-01-01 0.0022050000000000000 1988-01-01 0.0017109999999999998 1989-01-01 0.0023740000000000000 1990-01-01 0.0021260000000000003 1991-01-01 0.0038650000000000000 1992-01-01 0.0034219999999999997 1993-01-01 0.0034409999999999996 1994-01-01 0.0035380000000000003 1995-01-01 0.0026700000000000000 1996-01-01 0.0058600000000000000 1997-01-01 0.0198030000000000000 1998-01-01 0.0186140000000000000 1999-01-01 0.0173510000000000000 2000-01-01 0.0145120000000000000 2001-01-01 0.0154590000000000000 2002-01-01 0.0204540000000000000 2003-01-01 0.2487420000000000200 2004-01-01 0.1271640000000000000 2005-01-01 0.1017110000000000000 2006-01-01 0.0899290000000000000 2007-01-01 0.0655480000000000000 2008-01-01 0.0433610000000000040 2009-01-01 0.0400260000000000000 2010-01-01 0.0363690000000000000 2011-01-01 0.0436040000000000040 2012-01-01 0.0309480000000000030 2013-01-01 0.0323450000000000000 2014-01-01 0.0265360000000000000