Year Percent 1996-01-01 2.8356500000000000 1997-01-01 2.5050500000000000 1998-01-01 2.5317600000000000 1999-01-01 0.9396920000000000 2000-01-01 2.4089800000000000 2001-01-01 1.6318600000000000 2002-01-01 0.6567300000000000 2003-01-01 3.1739599999999997 2004-01-01 2.6819599999999997 2005-01-01 1.5304799999999998 2006-01-01 1.6786500000000000 2007-01-01 2.2929200000000000 2008-01-01 3.1481100000000000 2009-01-01 2.2758500000000000 2010-01-01 1.5941700000000000 2011-01-01 0.8550559999999999 2012-01-01 1.0160799999999999 2013-01-01 1.3029300000000000 2014-01-01 0.6755899999999999 2015-01-01 2.7485300000000000