Year Percent 1991-01-01 1.75945000000000000 1992-01-01 1.36182000000000000 1993-01-01 1.38963000000000000 1994-01-01 2.40097000000000000 1995-01-01 0.98744200000000000 1996-01-01 2.25541000000000000 1997-01-01 3.15061000000000000 1998-01-01 2.32916000000000000 1999-01-01 2.04513000000000000 2000-01-01 1.67602000000000000 2001-01-01 1.11927000000000000 2002-01-01 0.37506900000000000 2003-01-01 0.09881400000000000 2004-01-01 1.93415000000000000 2005-01-01 3.02432000000000000 2006-01-01 1.43662999999999990 2007-01-01 0.29664900000000000 2008-01-01 0.29664900000000000 2009-01-01 2.49130000000000000 2010-01-01 3.95406999999999980 2011-01-01 2.79964000000000000 2012-01-01 1.88900999999999990 2013-01-01 0.45910500000000004 2014-01-01 1.22210000000000000 2015-01-01 2.46561000000000000 2016-01-01 4.00889000000000000