Year	Percent
1989-01-01	5.9022000000000000
1990-01-01	6.2889500000000000
1991-01-01	10.9389000000000000
1992-01-01	15.1710000000000000
1993-01-01	23.4921000000000000
1994-01-01	22.9324000000000000
1995-01-01	18.4118000000000000
1996-01-01	15.9514000000000000
1997-01-01	17.6921000000000000
1998-01-01	13.1232000000000000
1999-01-01	9.5028899999999990
2000-01-01	8.7697300000000010
2001-01-01	7.4664600000000005
2002-01-01	10.2420000000000000
2003-01-01	16.1954000000000000
2004-01-01	31.4701000000000000
2005-01-01	41.4148000000000000
2006-01-01	32.9347000000000000
2007-01-01	36.8789000000000000
2008-01-01	29.1556000000000000
2009-01-01	14.9045000000000000
2010-01-01	19.2790000000000000
2011-01-01	16.5549000000000000
2012-01-01	16.8696000000000000
2013-01-01	21.1531000000000000
2014-01-01	26.3252000000000000
2015-01-01	26.0660000000000000
2016-01-01	28.0538000000000000