Year Percent 1995-01-01 29.8836000000000000 1996-01-01 20.5276000000000000 1997-01-01 33.9157000000000000 1998-01-01 41.3496000000000000 1999-01-01 43.1665000000000000 2000-01-01 27.6464000000000000 2001-01-01 30.6846000000000000 2002-01-01 16.2034000000000000 2003-01-01 12.4534000000000000 2004-01-01 7.9680800000000005 2005-01-01 11.3800000000000000 2006-01-01 7.5473500000000000 2007-01-01 5.1134100000000000 2008-01-01 8.5723000000000000 2009-01-01 11.0276000000000000 2010-01-01 9.9901900000000000 2011-01-01 8.3090100000000000 2012-01-01 0.8665630000000000 2013-01-01 0.8005630000000000 2014-01-01 0.7887870000000000 2015-01-01 2.4280700000000000 2016-01-01 2.6223300000000000