Year Percent 1989-01-01 0.258109000000000030 1990-01-01 2.130770000000000000 1991-01-01 4.823030000000000000 1992-01-01 4.649719999999999000 1993-01-01 2.741720000000000000 1994-01-01 1.700130000000000000 1995-01-01 0.751294999999999900 1996-01-01 1.029590000000000000 1997-01-01 2.741500000000000000 1998-01-01 2.621490000000000000 1999-01-01 1.198660000000000000 2000-01-01 1.290520000000000100 2001-01-01 1.300860000000000100 2002-01-01 0.432664000000000050 2003-01-01 0.133835999999999980 2004-01-01 0.249119000000000000 2005-01-01 0.232853000000000030 2006-01-01 0.237755000000000020 2007-01-01 0.237755000000000020 2008-01-01 0.237755000000000020 2009-01-01 0.237755000000000020 2010-01-01 0.013563999999999998 2011-01-01 0.011210000000000000 2012-01-01 0.009826999999999999