Year Percent 1993-01-01 0.7770790000000000 1994-01-01 1.0908900000000000 1995-01-01 1.4153799999999999 1996-01-01 1.5190700000000001 1997-01-01 3.1001000000000000 1998-01-01 4.4208400000000000 1999-01-01 3.9375500000000000 2000-01-01 2.8346800000000000 2001-01-01 2.9138100000000000 2002-01-01 3.3229100000000000 2003-01-01 2.2702100000000000 2004-01-01 1.3141500000000000 2005-01-01 1.3224100000000000 2006-01-01 1.2433900000000000 2007-01-01 0.8396260000000000 2008-01-01 0.6739280000000000 2009-01-01 0.6770250000000000 2010-01-01 1.1143200000000000 2011-01-01 2.9363500000000000 2012-01-01 4.3183400000000000 2013-01-01 3.8815400000000000 2014-01-01 3.1919200000000000 2015-01-01 1.8753300000000000 2016-01-01 1.0381300000000000