Year	Percent
1975-01-01	0.12779200000000002
1976-01-01	0.13141000000000000
1977-01-01	0.26216400000000000
1978-01-01	0.38980500000000000
1979-01-01	1.00057000000000020
1980-01-01	1.41812000000000000
1981-01-01	2.02548000000000000
1982-01-01	3.36711000000000000
1983-01-01	6.50415000000000000
1984-01-01	8.20002000000000000
1985-01-01	8.43647000000000000
1986-01-01	10.11330000000000000
1987-01-01	10.73040000000000000
1988-01-01	9.60902000000000000
1989-01-01	8.38456000000000000
1990-01-01	7.04034000000000000
1991-01-01	6.75034000000000000
1992-01-01	8.85369000000000000
1993-01-01	14.88070000000000000
1994-01-01	28.63770000000000000
1995-01-01	37.16130000000000000
1996-01-01	41.07070000000000000
1997-01-01	50.57340000000000000
1998-01-01	64.79280000000000000
1999-01-01	75.18370000000000000
2000-01-01	109.89500000000000000
2001-01-01	133.24900000000000000
2002-01-01	95.89490000000000000
2003-01-01	64.03040000000000000
2004-01-01	69.21180000000000000
2005-01-01	111.65100000000001000
2006-01-01	136.39900000000000000
2007-01-01	174.19900000000000000
2008-01-01	160.75600000000000000
2009-01-01	109.48299999999999000
2010-01-01	86.92070000000000000
2011-01-01	88.26370000000000000
2012-01-01	79.00720000000000000