Year Percent 1996-01-01 5.882350000000000 1997-01-01 6.779660000000001 1998-01-01 7.874020000000000 1999-01-01 9.302330000000000 2000-01-01 20.000000000000000 2001-01-01 21.818200000000000 2002-01-01 18.260900000000000 2003-01-01 13.888900000000000 2004-01-01 11.875000000000000 2005-01-01 16.528900000000000 2006-01-01 24.285700000000000 2007-01-01 26.274500000000000 2008-01-01 30.707600000000000 2009-01-01 9.081080000000000 2010-01-01 7.261410000000001 2011-01-01 9.460740000000000 2012-01-01 2.184710000000000 2013-01-01 4.362050000000000 2014-01-01 5.057960000000000 2015-01-01 5.041780000000000 2016-01-01 6.004580000000001