Year	Percent
1979-01-01	61.029500000000000
1980-01-01	59.318000000000005
1981-01-01	54.861300000000000
1982-01-01	53.623600000000000
1983-01-01	61.806700000000000
1984-01-01	57.336500000000000
1985-01-01	59.999300000000000
1986-01-01	63.273400000000000
1987-01-01	57.717700000000000
1988-01-01	52.062800000000000
1989-01-01	58.959700000000000
1990-01-01	60.595800000000000
1991-01-01	66.706600000000000
1992-01-01	67.577200000000000
1993-01-01	70.793500000000000
1994-01-01	68.734900000000000
1995-01-01	72.202400000000000
1996-01-01	74.268999999999990
1997-01-01	72.773400000000000
1998-01-01	76.361900000000000
1999-01-01	79.644400000000000
2000-01-01	84.985400000000000
2001-01-01	88.271000000000000
2002-01-01	88.827300000000000
2003-01-01	98.630100000000000
2004-01-01	103.463000000000000
2005-01-01	106.435000000000000
2006-01-01	101.941000000000000
2007-01-01	108.371000000000010
2008-01-01	104.647000000000000
2009-01-01	106.777999999999990
2010-01-01	112.939000000000000
2011-01-01	117.198000000000000
2012-01-01	133.105000000000000
2013-01-01	138.859000000000000
2014-01-01	143.000000000000000
2015-01-01	147.371000000000000
2016-01-01	147.078000000000000