Year Percent 1994-01-01 3.5236099999999997 1995-01-01 3.2502600000000000 1996-01-01 2.9994900000000000 1997-01-01 2.6670599999999998 1998-01-01 2.3859400000000000 1999-01-01 2.2807300000000000 2000-01-01 2.0007700000000000 2001-01-01 3.8693199999999996 2002-01-01 3.5466599999999997 2003-01-01 6.3782900000000000 2004-01-01 6.7926400000000000 2005-01-01 1.1911100000000001 2006-01-01 1.8158800000000000 2007-01-01 1.4922400000000000 2008-01-01 1.4086500000000000 2009-01-01 1.2990000000000002 2010-01-01 2.5478600000000000 2011-01-01 3.6320200000000000 2012-01-01 3.4576000000000000 2013-01-01 5.7933400000000000 2014-01-01 7.8794699999999995 2015-01-01 12.4932000000000000 2016-01-01 13.9381000000000000