Year	Percent
1989-01-01	2.2149799999999997
1990-01-01	1.4932299999999998
1991-01-01	0.7029370000000000
1992-01-01	0.6308070000000000
1993-01-01	0.7332600000000000
1994-01-01	0.7722490000000000
1995-01-01	0.7948210000000000
1996-01-01	0.7513850000000001
1997-01-01	1.4775300000000000
1998-01-01	4.2796000000000000
1999-01-01	4.7899800000000000
2000-01-01	4.4165100000000000
2001-01-01	4.4835300000000000
2002-01-01	4.6286800000000000
2003-01-01	4.1269200000000000
2004-01-01	3.3395200000000000
2005-01-01	2.4036100000000000
2006-01-01	1.8816500000000000
2007-01-01	2.1255500000000000
2008-01-01	2.7122500000000000
2009-01-01	4.4499200000000000
2010-01-01	6.1306199999999995