Year	Percent
1980-01-01	1.1453000000000000
1981-01-01	1.1853900000000000
1982-01-01	1.8565700000000000
1983-01-01	2.6285900000000000
1984-01-01	3.4539100000000000
1985-01-01	3.9548600000000000
1986-01-01	3.9104800000000000
1987-01-01	3.9640000000000000
1988-01-01	4.0258400000000005
1989-01-01	4.1855000000000000
1990-01-01	3.6459599999999996
1991-01-01	4.9392300000000000
1992-01-01	5.2120100000000000
1993-01-01	7.1094300000000010
1994-01-01	8.2386000000000000
1995-01-01	9.0976200000000000
1996-01-01	11.4947000000000000
1997-01-01	19.6507000000000000
1998-01-01	23.7435000000000000
1999-01-01	25.7091000000000000
2000-01-01	33.9324000000000000
2001-01-01	34.5952000000000000
2002-01-01	38.5596000000000000
2003-01-01	41.5327000000000000
2004-01-01	60.2821000000000000
2005-01-01	61.9439000000000000
2006-01-01	69.1774000000000000
2007-01-01	75.1572000000000000
2008-01-01	63.5735000000000000
2009-01-01	72.7422000000000000
2010-01-01	65.1511000000000000
2011-01-01	52.7775000000000000
2012-01-01	58.6358000000000000
2013-01-01	52.6152000000000000
2014-01-01	54.4169000000000000
2015-01-01	59.2375000000000000
2016-01-01	62.5175000000000000