Year	Percent
1984-01-01	52.91790000000000
1985-01-01	57.37050000000000
1986-01-01	59.14720000000000
1987-01-01	56.49240000000000
1988-01-01	54.02140000000000
1989-01-01	57.93260000000000
1990-01-01	58.33520000000000
1991-01-01	60.64050000000000
1992-01-01	58.88590000000000
1993-01-01	69.17040000000000
1994-01-01	75.97650000000000
1995-01-01	74.13950000000000
1996-01-01	76.24390000000000
1997-01-01	81.53890000000000
1998-01-01	83.51500000000000
1999-01-01	81.42900000000000
2000-01-01	75.19870000000000
2001-01-01	67.65960000000000
2002-01-01	57.05500000000000
2003-01-01	48.70800000000000
2004-01-01	39.22870000000000
2005-01-01	39.99730000000000
2006-01-01	38.69250000000000
2007-01-01	40.07260000000000
2008-01-01	48.39130000000000
2009-01-01	54.86150000000000
2010-01-01	50.49140000000000
2011-01-01	50.08250000000000
2012-01-01	53.06810000000000
2013-01-01	55.24300000000000
2014-01-01	67.57580000000000
2015-01-01	100.83100000000000
2016-01-01	112.25399999999999