Year Percent 1996-01-01 0.9047320000000000 1997-01-01 51.0601000000000000 1998-01-01 1152.3700000000000000 1999-01-01 362.8970000000000000 2000-01-01 1732.2900000000000000 2001-01-01 179.0590000000000300 2002-01-01 24.6429000000000000 2003-01-01 3.8176099999999997 2004-01-01 8.1496100000000010 2005-01-01 18.3437000000000000 2006-01-01 22.1574000000000000 2007-01-01 26.2963000000000000 2008-01-01 8.1173399999999990 2009-01-01 7.2389500000000000 2010-01-01 4.6850700000000000 2011-01-01 8.0031400000000000 2012-01-01 5.6237500000000000