Year	Percent
1980-01-01	1.6402599999999998
1981-01-01	1.4950200000000000
1982-01-01	1.4756500000000000
1983-01-01	2.1726799999999997
1984-01-01	2.2461700000000000
1985-01-01	8.6693000000000000
1986-01-01	14.8020000000000000
1987-01-01	17.8714000000000000
1988-01-01	19.2180000000000000
1989-01-01	25.8059000000000000
1990-01-01	31.9993000000000000
1991-01-01	31.5466000000000000
1992-01-01	35.2198000000000000
1993-01-01	50.6833000000000000
1994-01-01	51.8741000000000000
1995-01-01	48.2312000000000000
1996-01-01	45.5556000000000000
1997-01-01	41.6854000000000000
1998-01-01	52.3022000000000000
1999-01-01	59.9750000000000000
2000-01-01	78.9704000000000000
2001-01-01	100.1500000000000000
2002-01-01	105.3639999999999900
2003-01-01	132.1910000000000000
2004-01-01	195.1770000000000200
2005-01-01	243.7750000000000000
2006-01-01	316.2920000000000300
2007-01-01	293.7770000000000000
2008-01-01	294.1280000000000000
2009-01-01	367.1930000000000400
2010-01-01	291.8780000000000000
2011-01-01	212.3730000000000000
2012-01-01	146.5600000000000000
2013-01-01	109.8789999999999900
2014-01-01	88.7441000000000000
2015-01-01	75.7787000000000000
2016-01-01	55.7572000000000000