Year	Percent
1992-01-01	2.1679200000000000
1993-01-01	3.1527500000000000
1994-01-01	4.1931300000000000
1995-01-01	4.6092900000000006
1996-01-01	4.1322300000000000
1997-01-01	7.0901300000000000
1998-01-01	10.4247000000000000
1999-01-01	8.8440000000000000
2000-01-01	8.5036500000000000
2001-01-01	12.1139000000000000
2002-01-01	15.2678000000000000
2003-01-01	44.9894000000000000
2004-01-01	121.9050000000000000
2005-01-01	238.4909999999999900
2006-01-01	331.2709999999999600
2007-01-01	251.5370000000000000
2008-01-01	118.1320000000000000
2009-01-01	100.3160000000000000
2010-01-01	51.2688000000000000
2011-01-01	36.9435000000000000
2012-01-01	54.1611000000000000
2013-01-01	58.6684000000000000
2014-01-01	61.3759000000000000
2015-01-01	76.8261000000000000
2016-01-01	58.5254000000000000
2017-01-01	38.4233000000000000