Year	Percent
1980-01-01	0.8385229999999999
1981-01-01	0.9962409999999999
1982-01-01	1.2097700000000000
1983-01-01	1.7701300000000000
1984-01-01	1.7296400000000000
1985-01-01	2.1449500000000000
1986-01-01	2.3572700000000000
1987-01-01	2.5531099999999998
1988-01-01	2.7170900000000002
1989-01-01	2.7928700000000000
1990-01-01	3.1852900000000000
1991-01-01	3.2982600000000000
1992-01-01	3.2327900000000000
1993-01-01	6.2314300000000005
1994-01-01	7.9424899999999990
1995-01-01	8.3908100000000000
1996-01-01	10.8136000000000000
1997-01-01	12.8553000000000000
1998-01-01	16.8786000000000000
1999-01-01	20.6603000000000000
2000-01-01	26.6018000000000000
2001-01-01	29.0914000000000000
2002-01-01	31.5778000000000000
2003-01-01	36.4634000000000000
2004-01-01	34.1838000000000000
2005-01-01	36.9543000000000000
2006-01-01	51.9317000000000000
2007-01-01	61.5863000000000000
2008-01-01	61.3539000000000000
2009-01-01	73.6870000000000000
2010-01-01	71.8331000000000000
2011-01-01	69.3019000000000000
2012-01-01	81.7357000000000000
2013-01-01	81.7498000000000000
2014-01-01	70.6397000000000000
2015-01-01	73.3346000000000000
2016-01-01	63.8389000000000000