Year	Percent
1989-01-01	3.8431900000000003
1990-01-01	3.9469800000000004
1991-01-01	5.2635200000000000
1992-01-01	4.5219800000000000
1993-01-01	11.7099000000000000
1994-01-01	13.2647000000000000
1995-01-01	17.0386000000000000
1996-01-01	29.0060000000000000
1997-01-01	35.8359000000000000
1998-01-01	34.7956000000000000
1999-01-01	18.1550000000000000
2000-01-01	7.4708900000000000
2001-01-01	10.8922000000000000
2002-01-01	3.9184900000000003
2003-01-01	10.7095000000000000
2004-01-01	16.9681000000000000
2005-01-01	17.7561000000000000
2006-01-01	19.5522000000000000
2007-01-01	35.4714000000000000
2008-01-01	34.6015000000000000
2009-01-01	20.8589000000000000
2010-01-01	11.1412000000000000
2011-01-01	10.8442000000000000
2012-01-01	10.3263000000000000
2013-01-01	13.2440000000000020
2014-01-01	12.6685000000000000
2015-01-01	10.4969000000000000
2016-01-01	8.8088900000000000
2017-01-01	8.2803100000000000