Year	Percent
1983-01-01	11.5873000000000000
1984-01-01	19.8264000000000000
1985-01-01	26.0528000000000000
1986-01-01	27.9047000000000000
1987-01-01	26.8788000000000000
1988-01-01	27.1290000000000000
1989-01-01	28.5402000000000000
1990-01-01	27.4021000000000000
1991-01-01	15.2259999999999990
1992-01-01	13.1439000000000000
1993-01-01	9.0733800000000000
1994-01-01	7.6061900000000000
1995-01-01	3.1482799999999997
1996-01-01	6.1622900000000005
1997-01-01	13.5002000000000000
1998-01-01	16.1089000000000000
1999-01-01	111.7220000000000100
2000-01-01	32.5268000000000000
2001-01-01	31.4982000000000000
2002-01-01	41.8630000000000000
2003-01-01	50.0211000000000000
2004-01-01	42.1770000000000000
2005-01-01	57.8825000000000000
2006-01-01	95.2362000000000000
2007-01-01	135.5410000000000000
2008-01-01	148.4680000000000000
2009-01-01	202.6140000000000000
2010-01-01	198.5620000000000000
2011-01-01	223.6780000000000000
2012-01-01	298.8220000000000000
2013-01-01	251.8030000000000000
2014-01-01	271.2750000000000000
2015-01-01	269.0140000000000000
2016-01-01	235.7010000000000000