Year	Percent
1990-01-01	2.023650000000000000
1991-01-01	1.375489999999999900
1992-01-01	1.220970000000000000
1993-01-01	1.471779999999999900
1994-01-01	1.773550000000000000
1995-01-01	2.167540000000000200
1996-01-01	2.825630000000000000
1997-01-01	3.391790000000000300
1998-01-01	3.711659999999999700
1999-01-01	3.292059999999999800
2000-01-01	2.903410000000000000
2001-01-01	2.893360000000000000
2002-01-01	2.734310000000000000
2003-01-01	2.142700000000000000
2004-01-01	1.583640000000000000
2005-01-01	1.107350000000000000
2006-01-01	0.500645000000000000
2007-01-01	0.500645000000000000
2008-01-01	0.500645000000000000
2009-01-01	0.005638000000000001
2010-01-01	0.008256000000000000
2011-01-01	0.014186000000000000