Year Percent 1994-01-01 3.0804400000000003 1995-01-01 1.0235299999999998 1996-01-01 1.6396900000000000 1997-01-01 7.9217500000000000 1998-01-01 14.3244000000000000 1999-01-01 15.6685000000000000 2000-01-01 14.2573000000000000 2001-01-01 14.2573000000000000 2002-01-01 14.2573000000000000 2003-01-01 14.2573000000000000 2004-01-01 25.0021000000000000 2005-01-01 27.6853000000000000 2006-01-01 27.1616000000000000 2007-01-01 28.1875000000000000 2008-01-01 21.2786000000000000 2009-01-01 28.9975000000000000 2010-01-01 33.8547000000000000 2011-01-01 30.2108000000000000 2012-01-01 35.8304000000000000 2013-01-01 38.0424000000000000 2014-01-01 37.2702000000000000 2015-01-01 43.0088000000000000 2016-01-01 50.5291000000000000