Year	Percent
1989-01-01	8.140120000000000
1990-01-01	9.180370000000000
1991-01-01	12.470000000000000
1992-01-01	13.281900000000000
1993-01-01	0.350606000000000
1994-01-01	0.509213000000000
1995-01-01	1.426080000000000
1996-01-01	55.053000000000004
1997-01-01	95.628300000000000
1998-01-01	110.147000000000000
1999-01-01	347.978000000000000
2000-01-01	477.991999999999960
2001-01-01	230.650999999999980
2002-01-01	342.531000000000000
2003-01-01	502.291000000000000
2004-01-01	454.998000000000050
2005-01-01	307.467000000000000
2006-01-01	276.128000000000000
2007-01-01	177.642000000000000
2008-01-01	85.263800000000000
2009-01-01	70.198200000000000
2010-01-01	34.072500000000000
2011-01-01	27.257100000000000
2012-01-01	31.638400000000000
2013-01-01	1.150890000000000
2014-01-01	0.838975000000000
2015-01-01	38.438100000000000
2016-01-01	35.224800000000000