Year	Percent
1996-01-01	87.76799999999999
1997-01-01	87.10040000000000
1998-01-01	71.31350000000000
1999-01-01	71.31800000000000
2000-01-01	66.34170000000000
2001-01-01	60.10060000000000
2002-01-01	52.44440000000000
2003-01-01	52.23290000000000
2004-01-01	44.25910000000000
2005-01-01	37.41850000000000
2006-01-01	37.94130000000000
2007-01-01	48.94390000000000
2008-01-01	49.61870000000000
2009-01-01	49.74170000000000
2010-01-01	45.64330000000000
2011-01-01	43.84820000000000
2012-01-01	42.99070000000000
2013-01-01	43.96350000000000
2014-01-01	49.64660000000000
2015-01-01	56.73330000000000
2016-01-01	55.93770000000000