Year	Percent
1984-01-01	1.9919700000000000
1985-01-01	2.0171300000000000
1986-01-01	2.4389800000000000
1987-01-01	2.5498800000000000
1988-01-01	2.4254200000000000
1989-01-01	2.9542300000000000
1990-01-01	4.1159099999999995
1991-01-01	6.9036300000000010
1992-01-01	8.8373900000000000
1993-01-01	10.6923000000000000
1994-01-01	13.0921000000000000
1995-01-01	12.6242000000000000
1996-01-01	11.9341000000000000
1997-01-01	10.9863000000000000
1998-01-01	9.5294600000000000
1999-01-01	8.7767699999999990
2000-01-01	8.8670600000000000
2001-01-01	9.8016700000000000
2002-01-01	10.9025000000000000
2003-01-01	12.9972000000000000
2004-01-01	14.3726000000000000
2005-01-01	14.2616000000000000
2006-01-01	14.6653000000000000
2007-01-01	15.6966000000000000
2008-01-01	16.1857000000000000
2009-01-01	26.9304000000000000
2010-01-01	37.1594000000000000
2011-01-01	39.3603000000000000
2012-01-01	39.7764000000000000
2013-01-01	38.9752000000000000
2014-01-01	39.3967000000000000
2015-01-01	40.7326000000000000
2016-01-01	44.2086000000000000