Year Percent 1990 0 1993 0 1994 0 1995 0 1996 0 1997 0.00902 1998 0.00877 1999 0.0255 2000 0.13671 2001 0.15782 2002 0.22709 2007 0.41 2008 0.47 2009 0.54 2010 0.61 2011 0.7 2012 0.8 2013 0.9 2014 0.99 2015 1.08373 2016 1.17712