Year	Percent
1990-01-01	60.86620
1991-01-01	70.39040
1992-01-01	78.73890
1993-01-01	71.78530
1994-01-01	66.42920
1995-01-01	56.64740
1996-01-01	33.18640
1997-01-01	16.86430
1998-01-01	8.46592
1999-01-01	8.46592
2000-01-01	8.46592
2001-01-01	8.46592
2002-01-01	8.46592
2003-01-01	8.46592
2004-01-01	8.46592
2005-01-01	8.46592
2006-01-01	8.46592
2007-01-01	8.46592
2008-01-01	8.46592
2009-01-01	8.46592
2010-01-01	2.61024
2011-01-01	3.21750