Year	Percent
1989-01-01	2.8239500000000000
1990-01-01	9.0179000000000000
1991-01-01	17.2668000000000000
1992-01-01	14.9486000000000000
1993-01-01	13.4207000000000000
1994-01-01	8.5772500000000000
1995-01-01	5.6231200000000000
1996-01-01	8.7007600000000000
1997-01-01	13.4987000000000000
1998-01-01	11.2722000000000000
1999-01-01	7.3012300000000000
2000-01-01	6.2912900000000000
2001-01-01	5.6250000000000000
2002-01-01	4.2276900000000000
2003-01-01	4.0713900000000000
2004-01-01	4.1370900000000000
2005-01-01	3.6857300000000004
2006-01-01	3.4939699999999996
2007-01-01	3.4939699999999996
2008-01-01	3.4939699999999996
2009-01-01	3.4939699999999996
2010-01-01	1.5414299999999999
2011-01-01	1.1646200000000000
2012-01-01	3.7380400000000003