Year	Percent
1980-01-01	1.6455000000000000
1981-01-01	1.7307800000000000
1982-01-01	2.1126200000000000
1983-01-01	2.4488900000000000
1984-01-01	1.9445000000000000
1985-01-01	1.6686700000000000
1986-01-01	2.0798000000000000
1987-01-01	1.6802099999999998
1988-01-01	1.0962399999999999
1989-01-01	0.7670510000000000
1990-01-01	12.8901000000000000
1991-01-01	11.7581000000000000
1992-01-01	11.2530000000000000
1993-01-01	11.1992000000000000
1994-01-01	11.8346000000000000
1995-01-01	15.3998000000000000
1996-01-01	16.4120000000000000
1997-01-01	14.2897000000000000
1998-01-01	13.7927000000000000
1999-01-01	13.8702000000000000
2000-01-01	12.1079999999999990
2001-01-01	10.8864000000000000
2002-01-01	10.4319000000000000
2003-01-01	9.8713900000000000
2004-01-01	10.0747000000000000
2005-01-01	9.3567300000000000
2006-01-01	8.5595400000000000
2007-01-01	8.3374300000000000
2008-01-01	7.2158700000000000
2009-01-01	10.2053000000000000
2010-01-01	9.5252900000000000
2011-01-01	9.9305000000000000
2012-01-01	11.9647000000000000
2013-01-01	13.4297000000000000
2014-01-01	14.5209000000000000
2015-01-01	17.8409999999999980
2016-01-01	22.3419000000000000