Year	Percent
1983-01-01	8.6302300000000010
1984-01-01	8.0186100000000000
1985-01-01	6.2769300000000000
1986-01-01	5.4033400000000000
1987-01-01	4.1785100000000000
1988-01-01	1.1045300000000000
1989-01-01	0.3618330000000000
1990-01-01	0.6145060000000000
1991-01-01	4.1730400000000000
1992-01-01	6.9516100000000005
1993-01-01	5.6826300000000005
1994-01-01	6.6006300000000010
1995-01-01	6.0528600000000000
1996-01-01	8.3660400000000000
1997-01-01	9.8661800000000000
1998-01-01	8.3066800000000000
1999-01-01	8.8205300000000000
2000-01-01	9.9289399999999990
2001-01-01	11.5286000000000000
2002-01-01	13.2598000000000000
2003-01-01	16.8012000000000000
2004-01-01	22.2707000000000000
2005-01-01	31.8697000000000000
2006-01-01	75.4989000000000000
2007-01-01	76.4232000000000000
2008-01-01	59.2644000000000000
2009-01-01	71.1342000000000000
2010-01-01	68.6646000000000000
2011-01-01	58.6646000000000000
2012-01-01	63.0370000000000000
2013-01-01	57.1478000000000000
2014-01-01	45.5219000000000000