Year	Percent
1980-01-01	0.32181000000000000
1981-01-01	0.36279200000000000
1982-01-01	0.67078900000000010
1983-01-01	0.51277100000000000
1984-01-01	0.33456199999999997
1985-01-01	0.42803400000000000
1986-01-01	0.34244600000000003
1987-01-01	0.37474100000000000
1988-01-01	0.27481800000000000
1989-01-01	0.19737900000000000
1990-01-01	0.19737900000000000
1991-01-01	0.24314400000000000
1992-01-01	0.30243300000000000
1993-01-01	10.89870000000000000
1994-01-01	10.86400000000000000
1995-01-01	12.81170000000000000
1996-01-01	15.19240000000000000
1997-01-01	16.72760000000000000
1998-01-01	17.75250000000000000
1999-01-01	21.26300000000000000
2000-01-01	23.86560000000000000
2001-01-01	26.89500000000000000
2002-01-01	74.04750000000000000
2003-01-01	61.91970000000000000
2004-01-01	52.23450000000000000
2005-01-01	25.87599999999999800
2006-01-01	23.03580000000000000
2007-01-01	19.18030000000000000
2008-01-01	12.50260000000000000
2009-01-01	13.41420000000000000
2010-01-01	10.57310000000000000
2011-01-01	8.35260000000000000
2012-01-01	7.66213000000000000
2013-01-01	7.40678000000000000
2014-01-01	7.42210000000000000
2015-01-01	6.19729000000000000
2016-01-01	12.33340000000000000