Year	Percent
1987-01-01	1.1569600000000000
1988-01-01	3.3213199999999996
1989-01-01	1.4652000000000000
1990-01-01	7.3474000000000000
1991-01-01	12.6613000000000000
1992-01-01	6.3099000000000000
1993-01-01	14.7224000000000000
1994-01-01	13.4964000000000000
1995-01-01	10.9319000000000000
1996-01-01	13.0964000000000000
1997-01-01	8.2855200000000000
1998-01-01	33.0273000000000000
1999-01-01	46.9855000000000000
2000-01-01	63.0707000000000000
2001-01-01	72.7350000000000000
2002-01-01	66.5951000000000000
2003-01-01	35.9964000000000000
2004-01-01	31.6632000000000000
2005-01-01	38.1255000000000000
2006-01-01	44.7334000000000000
2007-01-01	58.5915000000000000
2008-01-01	61.9811000000000000
2009-01-01	120.3330000000000000
2010-01-01	135.6970000000000000
2011-01-01	159.5630000000000000
2012-01-01	205.8140000000000200
2013-01-01	242.1909999999999700