Year Percent 1990 0 1994 0.00049 1995 0.00292 1996 0.0293 1997 0.04902 1998 0.07387 1999 0.49488 2000 1.8604 2001 4.30062 2002 8.95097 2006 16.2 2007 19.7 2008 23 2009 27.43 2010 31.8 2011 39.6489 2012 46.91 2013 54.17 2014 59.02 2015 67.3 2016 71.11305 2017 74.43645