Year Percent 1990 0 1995 0.02487 1996 0.26868 1997 0.39192 1998 0.50829 1999 0.49454 2000 0.4813 2001 0.46855 2002 0.50192 2003 0.55561 2004 0.64967 2005 0.84431 2006 1.64635 2007 2 2008 3 2009 4 2010 5 2011 6 2012 6.9974 2013 8 2014 9 2015 10.00046 2016 11.0009