Year	Percent
1973-01-01	7.173220000000000
1974-01-01	7.870080000000001
1975-01-01	10.988200000000000
1976-01-01	14.123400000000000
1977-01-01	17.322300000000000
1978-01-01	20.673800000000000
1979-01-01	19.922800000000000
1980-01-01	17.813300000000000
1981-01-01	18.659600000000000
1982-01-01	22.653800000000000
1983-01-01	26.537800000000000
1984-01-01	27.523900000000000
1985-01-01	29.981700000000000
1986-01-01	39.841600000000000
1987-01-01	37.717000000000000
1988-01-01	40.274200000000000
1989-01-01	37.376800000000000
1990-01-01	30.646500000000000
1991-01-01	32.345900000000000
1992-01-01	33.372900000000000
1993-01-01	35.366100000000000
1994-01-01	36.765800000000000
1995-01-01	36.952200000000000
1996-01-01	35.450100000000000
1997-01-01	35.556000000000000
1998-01-01	41.721600000000000
1999-01-01	41.395900000000000
2000-01-01	35.352100000000000
2001-01-01	37.562200000000000
2002-01-01	39.078400000000000
2003-01-01	40.281900000000000
2004-01-01	41.438500000000000
2005-01-01	45.790900000000000
2006-01-01	58.097500000000000
2007-01-01	59.091200000000000
2008-01-01	70.040900000000000
2009-01-01	101.231000000000010
2010-01-01	92.571800000000000
2011-01-01	79.741200000000000
2012-01-01	78.760700000000000
2013-01-01	80.760600000000000
2014-01-01	85.825500000000000
2015-01-01	106.187999999999990
2016-01-01	116.131000000000000