Year	Percent
1980-01-01	1.2368900000000000
1981-01-01	1.3446799999999999
1982-01-01	1.6136600000000000
1983-01-01	1.9022500000000000
1984-01-01	1.5020300000000000
1985-01-01	1.3289600000000001
1986-01-01	1.6784400000000002
1987-01-01	1.4271500000000000
1988-01-01	0.9713440000000001
1989-01-01	0.6682150000000000
1990-01-01	1.6044500000000000
1991-01-01	1.9200500000000000
1992-01-01	2.5742599999999998
1993-01-01	3.9700500000000000
1994-01-01	4.8858900000000000
1995-01-01	5.5297300000000010
1996-01-01	4.7567100000000000
1997-01-01	4.5601699999999990
1998-01-01	4.5169000000000000
1999-01-01	4.7551700000000000
2000-01-01	4.3192400000000000
2001-01-01	4.1479300000000010
2002-01-01	3.8664600000000000
2003-01-01	4.2593100000000000
2004-01-01	4.4245100000000000
2005-01-01	4.4145800000000000
2006-01-01	4.2700700000000000
2007-01-01	4.3889600000000000
2008-01-01	3.6461699999999997
2009-01-01	5.4953900000000000
2010-01-01	5.3234800000000000
2011-01-01	6.0525400000000005
2012-01-01	7.8595399999999990
2013-01-01	9.2242000000000000
2014-01-01	10.1854000000000000
2015-01-01	12.5036000000000000
2016-01-01	16.0621000000000000