Year	Percent
1983-01-01	0.9906010000000001
1984-01-01	3.3797800000000002
1985-01-01	9.2281700000000000
1986-01-01	11.4009000000000000
1987-01-01	21.9633000000000000
1988-01-01	19.5279000000000000
1989-01-01	16.6944000000000000
1990-01-01	10.9935000000000000
1991-01-01	10.8097000000000000
1992-01-01	9.0716500000000000
1993-01-01	5.6535600000000000
1994-01-01	0.8262160000000000
1995-01-01	1.2308800000000000
1996-01-01	2.0977200000000003
1997-01-01	13.7655000000000000
1998-01-01	14.3763000000000000
1999-01-01	17.8674000000000000
2000-01-01	15.4034000000000000
2001-01-01	16.4658000000000000
2002-01-01	20.2032000000000000
2003-01-01	28.5874000000000000
2004-01-01	25.2012000000000000
2005-01-01	27.6227000000000000
2006-01-01	27.5222000000000000
2007-01-01	28.0626000000000000
2008-01-01	21.7807000000000000
2009-01-01	29.3135000000000000
2010-01-01	33.8852000000000000
2011-01-01	30.4171000000000000
2012-01-01	36.0496000000000000
2013-01-01	38.4916000000000000
2014-01-01	37.6516000000000000
2015-01-01	42.9836000000000000
2016-01-01	49.7342000000000000