Year	Percent
1980-01-01	1.7426800000000000
1981-01-01	1.7010500000000000
1982-01-01	2.5919500000000000
1983-01-01	2.9998000000000000
1984-01-01	3.4435000000000000
1985-01-01	4.8364199999999995
1986-01-01	2.5325300000000000
1987-01-01	3.7043300000000000
1988-01-01	2.6109500000000000
1989-01-01	7.9163100000000000
1990-01-01	6.9675400000000000
1991-01-01	6.4245400000000000
1992-01-01	6.3658000000000000
1993-01-01	7.3216000000000000
1994-01-01	6.5328500000000000
1995-01-01	8.3616100000000000
1996-01-01	15.7313000000000000
1997-01-01	16.4770000000000000
1998-01-01	18.6342000000000000
1999-01-01	20.9831000000000000
2000-01-01	25.0546000000000000
2001-01-01	29.5253000000000000
2002-01-01	35.8022000000000000
2003-01-01	45.4266000000000000
2004-01-01	58.9191000000000000
2005-01-01	70.3787000000000000
2006-01-01	99.4282000000000000
2007-01-01	137.4789999999999800
2008-01-01	155.4760000000000000
2009-01-01	217.5830000000000000
2010-01-01	203.7270000000000000
2011-01-01	160.7690000000000000
2012-01-01	179.5580000000000000
2013-01-01	172.6790000000000000
2014-01-01	116.3970000000000000
2015-01-01	92.7047000000000000
2016-01-01	88.9106000000000000