Year	Percent
1975-01-01	52.589600000000000
1976-01-01	43.590000000000000
1977-01-01	42.068500000000000
1978-01-01	42.426800000000000
1979-01-01	40.281000000000000
1980-01-01	41.538700000000000
1981-01-01	41.923100000000000
1982-01-01	48.845200000000000
1983-01-01	48.461200000000000
1984-01-01	41.918600000000000
1985-01-01	41.005300000000000
1986-01-01	37.905200000000000
1987-01-01	39.404900000000000
1988-01-01	39.815800000000000
1989-01-01	44.866400000000000
1990-01-01	45.142900000000000
1991-01-01	46.131100000000000
1992-01-01	46.634900000000000
1993-01-01	53.163999999999994
1994-01-01	56.278999999999996
1995-01-01	57.263400000000000
1996-01-01	61.703200000000000
1997-01-01	66.886800000000000
1998-01-01	67.360900000000000
1999-01-01	69.371300000000000
2000-01-01	74.398300000000000
2001-01-01	82.737200000000000
2002-01-01	81.670200000000000
2003-01-01	74.542900000000000
2004-01-01	72.131300000000000
2005-01-01	78.096800000000000
2006-01-01	82.804100000000000
2007-01-01	90.775800000000000
2008-01-01	107.062000000000010
2009-01-01	114.583000000000000
2010-01-01	109.607999999999990
2011-01-01	106.201000000000010
2012-01-01	111.508000000000000
2013-01-01	110.930000000000000
2014-01-01	104.420000000000000
2015-01-01	89.913600000000000
2016-01-01	82.682100000000000