Year Percent 1995-01-01 1.5657600000000000 1996-01-01 1.8414300000000000 1997-01-01 3.1057500000000000 1998-01-01 4.1657400000000000 1999-01-01 3.1568099999999997 2000-01-01 3.0989600000000000 2001-01-01 2.9981800000000000 2002-01-01 2.4540000000000000 2003-01-01 2.3174000000000000 2004-01-01 1.7045700000000001 2005-01-01 1.4253700000000000 2006-01-01 2.3394900000000000 2007-01-01 8.1932000000000000 2008-01-01 9.8865400000000000 2009-01-01 8.4408100000000000 2010-01-01 10.9217000000000000 2011-01-01 13.2584000000000000 2012-01-01 11.6639000000000000