Year	Percent
1987-01-01	0.8900176
1988-01-01	0.9695452
1989-01-01	1.1230480
1990-01-01	1.2635940
1991-01-01	1.9749500
1992-01-01	1.6821120
1993-01-01	1.8459240
1994-01-01	1.7152410
1995-01-01	1.6012020
1996-01-01	1.6643870
1997-01-01	1.9682840
1998-01-01	2.0872740
1999-01-01	1.7088610
2000-01-01	1.5563790
2001-01-01	1.3717090
2002-01-01	1.2012280
2003-01-01	1.0502410
2004-01-01	1.5528310
2005-01-01	1.9844960
2006-01-01	2.7534020
2007-01-01	3.3614270
2008-01-01	3.6299420
2009-01-01	3.3929510
2010-01-01	3.0269720