Year	Percent
1977-01-01	0.23319099999999998
1978-01-01	0.21285700000000002
1979-01-01	0.18779000000000000
1980-01-01	0.24316300000000002
1981-01-01	0.25015300000000000
1982-01-01	0.24892899999999998
1983-01-01	0.46251499999999995
1984-01-01	1.73669000000000000
1985-01-01	3.03852000000000000
1986-01-01	3.75745000000000000
1987-01-01	6.26924000000000000
1988-01-01	8.44679000000000000
1989-01-01	7.24421999999999900
1990-01-01	4.67724000000000000
1991-01-01	3.45800000000000000
1992-01-01	2.50644000000000000
1993-01-01	5.33577000000000000
1994-01-01	8.17063999999999900
1995-01-01	9.73305000000000000
1996-01-01	10.41830000000000000
1997-01-01	12.74970000000000000
1998-01-01	13.79400000000000000
1999-01-01	17.83780000000000000
2000-01-01	24.91840000000000000
2001-01-01	35.73300000000000400
2002-01-01	44.38620000000000000
2003-01-01	54.33000000000000000
2004-01-01	56.65070000000000000
2005-01-01	56.44170000000000000
2006-01-01	73.15970000000000000
2007-01-01	80.78510000000000000
2008-01-01	76.95620000000000000
2009-01-01	104.91100000000000000
2010-01-01	96.65410000000000000
2011-01-01	84.91470000000000000
2012-01-01	85.59020000000000000
2013-01-01	79.51440000000000000
2014-01-01	59.78360000000000000
2015-01-01	57.42750000000000000
2016-01-01	49.39410000000000000