Year	Percent
1989-01-01	7.814620
1990-01-01	52.630400
1991-01-01	36.270600
1992-01-01	30.101300
1993-01-01	20.428900
1994-01-01	19.547100
1995-01-01	7.821550
1996-01-01	21.316600
1997-01-01	31.287100
1998-01-01	15.091100
1999-01-01	13.199200
2000-01-01	29.613300
2001-01-01	16.591100
2002-01-01	2.261120
2003-01-01	4.330920
2004-01-01	9.713430
2005-01-01	4.647380
2006-01-01	10.395400
2007-01-01	10.395400
2008-01-01	10.395400
2009-01-01	10.395400
2010-01-01	0.856649
2011-01-01	1.059950
2012-01-01	0.251456