Year	Percent
1984-01-01	52.91790000000000
1985-01-01	57.37050000000000
1986-01-01	59.61600000000001
1987-01-01	57.27060000000000
1988-01-01	54.61540000000000
1989-01-01	58.30510000000000
1990-01-01	58.92030000000000
1991-01-01	61.44250000000000
1992-01-01	59.54110000000000
1993-01-01	69.72750000000000
1994-01-01	76.33830000000000
1995-01-01	74.33740000000000
1996-01-01	76.30860000000000
1997-01-01	81.53920000000000
1998-01-01	83.51730000000000
1999-01-01	81.43110000000000
2000-01-01	75.19870000000000
2001-01-01	68.95460000000000
2002-01-01	59.94540000000000
2003-01-01	51.71150000000000
2004-01-01	41.52450000000000
2005-01-01	42.01190000000000
2006-01-01	40.35420000000000
2007-01-01	41.40450000000000
2008-01-01	49.57380000000000
2009-01-01	56.03260000000000
2010-01-01	51.43320000000000
2011-01-01	50.79690000000000
2012-01-01	53.37500000000000
2013-01-01	55.24550000000000
2014-01-01	67.57600000000001
2015-01-01	100.83200000000001
2016-01-01	112.25399999999999