Year	Percent
1980-01-01	0.45764700000000000
1981-01-01	0.40221500000000000
1982-01-01	0.26964899999999997
1983-01-01	0.17228100000000000
1984-01-01	0.10332700000000000
1985-01-01	0.11112400000000000
1986-01-01	0.15617600000000000
1987-01-01	0.94918099999999990
1988-01-01	1.30965000000000000
1989-01-01	1.32103000000000000
1990-01-01	4.52212000000000000
1991-01-01	5.65494000000000000
1992-01-01	3.19127000000000030
1993-01-01	3.31324000000000000
1994-01-01	4.18666999999999940
1995-01-01	4.06753000000000050
1996-01-01	4.76695000000000000
1997-01-01	9.78350000000000000
1998-01-01	23.92820000000000000
1999-01-01	79.71190000000000000
2000-01-01	96.21900000000000000
2001-01-01	46.26050000000000000
2002-01-01	19.38070000000000000
2003-01-01	14.42420000000000000
2004-01-01	16.00070000000000000
2005-01-01	17.94870000000000000
2006-01-01	24.78810000000000000
2007-01-01	33.63190000000000000
2008-01-01	30.13630000000000000
2009-01-01	20.68490000000000000
2010-01-01	16.35700000000000000
2011-01-01	11.43160000000000000
2012-01-01	7.37993000000000000
2013-01-01	8.21187000000000000
2014-01-01	12.08050000000000000
2015-01-01	11.63060000000000000
2016-01-01	7.74360000000000000
2017-01-01	6.89388000000000000