Year Percent 1996-01-01 0.955414000000000000 1997-01-01 1.106500000000000000 1998-01-01 0.736196000000000000 1999-01-01 0.641026000000000000 2000-01-01 0.541516000000000000 2001-01-01 0.061396000000000006 2002-01-01 0.061396000000000006 2003-01-01 0.061396000000000006 2004-01-01 0.061396000000000006 2005-01-01 4.299750000000000000 2006-01-01 3.504709999999999800 2007-01-01 4.396319999999999000 2008-01-01 4.158840000000000500 2009-01-01 2.717090000000000200 2010-01-01 2.420909999999999700 2011-01-01 1.261160000000000000 2012-01-01 2.064340000000000000 2013-01-01 2.157830000000000000 2014-01-01 1.389479999999999800 2015-01-01 1.349800000000000000 2016-01-01 1.538340000000000000