Year Percent 1996-01-01 0.49005800000000000 1997-01-01 2.24802000000000000 1998-01-01 2.83507000000000000 1999-01-01 1.19703999999999990 2000-01-01 0.58683500000000000 2001-01-01 0.47864700000000004 2002-01-01 0.44449099999999997 2003-01-01 0.60168000000000000 2004-01-01 0.74501700000000000 2005-01-01 2.56095999999999970 2006-01-01 6.68155000000000000 2007-01-01 3.93618000000000020 2008-01-01 4.65182000000000000 2009-01-01 3.85853000000000050 2010-01-01 3.73916999999999970 2011-01-01 3.01117000000000000 2012-01-01 1.05679000000000000 2013-01-01 0.61247600000000000 2014-01-01 0.82802300000000000 2015-01-01 1.13357000000000000 2016-01-01 1.39680000000000000 2017-01-01 1.45258000000000000