Year Percent 1999-01-01 29.82950000000000 2000-01-01 48.80950000000000 2001-01-01 28.64240000000000 2002-01-01 25.76420000000000 2003-01-01 40.38880000000000 2004-01-01 11.90120000000000 2005-01-01 13.72360000000000 2006-01-01 55.13200000000000 2007-01-01 74.81300000000000 2008-01-01 121.12899999999999 2009-01-01 101.52000000000000 2010-01-01 93.80010000000000 2011-01-01 55.49210000000000 2012-01-01 75.92680000000000 2013-01-01 75.32160000000000 2014-01-01 67.63710000000000 2015-01-01 81.86270000000000 2016-01-01 74.97570000000000