Year Percent 1993-01-01 5.6525500000000000 1994-01-01 6.8377300000000005 1995-01-01 8.2615800000000000 1996-01-01 7.7476600000000010 1997-01-01 9.0077100000000010 1998-01-01 11.3818000000000000 1999-01-01 11.2893000000000000 2000-01-01 11.6472000000000000 2001-01-01 13.1416000000000000 2002-01-01 14.9505000000000000 2003-01-01 16.8656000000000000 2004-01-01 18.9505000000000000 2005-01-01 21.9719999999999980 2006-01-01 25.6440000000000020 2007-01-01 30.1482000000000000 2008-01-01 34.5389000000000000 2009-01-01 43.3782000000000000 2010-01-01 38.5268000000000000 2011-01-01 38.4835000000000000 2012-01-01 41.1827000000000000 2013-01-01 45.6715000000000000 2014-01-01 49.7052000000000000 2015-01-01 56.3138000000000000 2016-01-01 56.0450000000000000