Year	Percent
1975-01-01	13.5212000000000000
1976-01-01	11.4923000000000000
1977-01-01	8.3682900000000000
1978-01-01	6.1350300000000000
1979-01-01	5.4228400000000000
1980-01-01	5.7689900000000005
1981-01-01	5.9667000000000000
1982-01-01	6.0038300000000010
1983-01-01	7.2378700000000000
1984-01-01	9.2864399999999990
1985-01-01	12.6416000000000000
1986-01-01	16.6133000000000000
1987-01-01	36.9063000000000000
1988-01-01	42.0330000000000000
1989-01-01	31.8020000000000000
1990-01-01	30.0137000000000000
1991-01-01	28.0564000000000000
1992-01-01	28.0903000000000000
1993-01-01	32.9148000000000000
1994-01-01	39.4737000000000000
1995-01-01	37.1876000000000000
1996-01-01	38.5036000000000000
1997-01-01	46.7706000000000000
1998-01-01	57.5962000000000000
1999-01-01	73.2259000000000000
2000-01-01	95.6920000000000100
2001-01-01	112.1490000000000000
2002-01-01	85.4766000000000000
2003-01-01	58.3972000000000000
2004-01-01	62.6726000000000000
2005-01-01	66.1546000000000000
2006-01-01	83.4769000000000000
2007-01-01	112.5760000000000100
2008-01-01	110.8729999999999900
2009-01-01	107.3720000000000100
2010-01-01	122.4889999999999900
2011-01-01	121.9690000000000000
2012-01-01	102.5720000000000000
2013-01-01	75.2899000000000000
2014-01-01	68.1670000000000000