Year	Percent
1983-01-01	20.45670000000000000
1984-01-01	10.03040000000000000
1985-01-01	6.06448000000000050
1986-01-01	10.45530000000000000
1987-01-01	8.57526000000000000
1988-01-01	63.92910000000000000
1989-01-01	73.18670000000000000
1990-01-01	78.60260000000000000
1991-01-01	97.38180000000000000
1992-01-01	135.00300000000000000
1993-01-01	80.05350000000000000
1994-01-01	96.69560000000000000
1995-01-01	34.80190000000000000
1996-01-01	36.66940000000000000
1997-01-01	26.36550000000000000
1998-01-01	29.12750000000000000
1999-01-01	31.77940000000000000
2000-01-01	26.12420000000000000
2001-01-01	23.81580000000000000
2002-01-01	16.33870000000000000
2003-01-01	2.68381000000000000
2004-01-01	2.10538000000000000
2005-01-01	0.97526000000000000
2006-01-01	0.80714500000000000
2007-01-01	0.46037600000000000
2008-01-01	1.08388000000000000
2009-01-01	0.84025100000000000
2010-01-01	0.34295400000000000
2011-01-01	0.13511800000000002
2012-01-01	0.13511800000000002
2013-01-01	0.13511800000000002
2014-01-01	0.00054100000000000
2015-01-01	1.38629000000000000
2016-01-01	1.71302999999999980