Year Percent 1992-01-01 0.5844870000000000 1993-01-01 1.0114700000000000 1994-01-01 1.7445000000000000 1995-01-01 1.8125400000000000 1996-01-01 2.0741300000000000 1997-01-01 3.1249100000000000 1998-01-01 4.4097599999999995 1999-01-01 6.0856900000000005 2000-01-01 8.6910500000000000 2001-01-01 13.9204000000000000 2002-01-01 21.9543000000000000 2003-01-01 32.0654000000000000 2004-01-01 31.2792000000000000 2005-01-01 30.0026000000000000 2006-01-01 40.1738000000000000 2007-01-01 39.1389000000000000 2008-01-01 26.4312000000000000 2009-01-01 28.3650000000000000 2010-01-01 22.1164000000000000 2011-01-01 20.1452000000000000 2012-01-01 19.0933000000000000 2013-01-01 19.5133000000000000 2014-01-01 21.7915000000000000 2015-01-01 27.3176000000000000 2016-01-01 29.8109000000000000