Year	Percent
1989-01-01	0.7276550000000000
1990-01-01	0.8627340000000000
1991-01-01	1.6448000000000000
1992-01-01	1.6617500000000000
1993-01-01	1.5974600000000000
1994-01-01	54.7775000000000000
1995-01-01	40.7244000000000000
1996-01-01	51.1801000000000000
1997-01-01	46.4556000000000000
1998-01-01	35.6094000000000000
1999-01-01	38.5993000000000000
2000-01-01	39.6103000000000000
2001-01-01	38.2869000000000000
2002-01-01	25.5801000000000000
2003-01-01	20.8164000000000000
2004-01-01	15.6584000000000000
2005-01-01	7.2765900000000000
2006-01-01	8.7277300000000010
2007-01-01	6.5094400000000010
2008-01-01	5.4421000000000000
2009-01-01	5.6490900000000000
2010-01-01	4.7500500000000000
2011-01-01	3.8593900000000003
2012-01-01	6.7806899999999990
2013-01-01	6.1999200000000000
2014-01-01	8.4432100000000000
2015-01-01	14.5062000000000000
2016-01-01	18.4136000000000000