Year Percent 1996-01-01 3.7612099999999997 1997-01-01 9.3714700000000000 1998-01-01 7.8059100000000010 1999-01-01 8.3980199999999990 2000-01-01 8.9990899999999990 2001-01-01 11.1995000000000000 2002-01-01 5.7296500000000000 2003-01-01 0.4474170000000000 2004-01-01 9.7737500000000000 2005-01-01 5.8701500000000000 2006-01-01 0.1741750000000000 2007-01-01 8.9549700000000000 2008-01-01 6.7017200000000000 2009-01-01 5.7076199999999995 2010-01-01 5.3050200000000000 2011-01-01 5.8211900000000005 2012-01-01 4.3344800000000000 2013-01-01 2.5358800000000000 2014-01-01 2.8106000000000000 2015-01-01 6.3081000000000000 2016-01-01 6.1693600000000000