Year	Percent
1996-01-01	68.64200000000000
1997-01-01	71.37620000000000
1998-01-01	69.60340000000000
1999-01-01	46.58140000000000
2000-01-01	39.88910000000000
2001-01-01	39.97010000000000
2002-01-01	40.18150000000000
2003-01-01	35.12740000000000
2004-01-01	37.68300000000000
2005-01-01	24.74050000000000
2006-01-01	24.37020000000000
2007-01-01	20.84640000000000
2008-01-01	21.58560000000000
2009-01-01	28.46540000000000
2010-01-01	28.50830000000000
2011-01-01	26.92920000000000
2012-01-01	29.83750000000000
2013-01-01	28.79430000000000
2014-01-01	31.56540000000000
2015-01-01	47.56420000000000
2016-01-01	41.75899999999999