Year	Percent
1975-01-01	10.7032000000000000
1976-01-01	11.6885000000000000
1977-01-01	3.9792099999999997
1978-01-01	5.9079600000000000
1979-01-01	8.7276000000000000
1980-01-01	10.3314000000000000
1981-01-01	11.8718000000000000
1982-01-01	8.2045500000000000
1983-01-01	12.1041000000000000
1984-01-01	10.2426000000000000
1985-01-01	14.7790000000000020
1986-01-01	18.2827000000000000
1987-01-01	24.5108000000000000
1988-01-01	15.4994000000000000
1989-01-01	17.6227000000000000
1990-01-01	13.3894000000000000
1991-01-01	14.7898000000000000
1992-01-01	16.0616000000000000
1993-01-01	26.0143000000000000
1994-01-01	27.5918000000000000
1995-01-01	29.3216000000000000
1996-01-01	34.0378000000000000
1997-01-01	35.8964000000000000
1998-01-01	35.0788000000000000
1999-01-01	30.9947000000000000
2000-01-01	56.2394000000000000
2001-01-01	65.3357000000000000
2002-01-01	59.7025000000000000
2003-01-01	52.8241000000000000
2004-01-01	65.3149000000000000
2005-01-01	67.6260000000000000
2006-01-01	74.9344000000000000
2007-01-01	87.1266000000000000
2008-01-01	91.5560000000000000
2009-01-01	100.7270000000000000
2010-01-01	69.5459000000000000
2011-01-01	69.9739999999999900
2012-01-01	67.6495000000000000
2013-01-01	63.9220000000000000
2014-01-01	65.3493000000000000
2015-01-01	63.8045000000000000
2016-01-01	64.9114000000000000
2017-01-01	58.1335000000000000