Year Percent 1990 0 1995 0.01184 1996 0.04007 1997 0.06093 1998 0.10283 1999 0.41634 2000 0.48475 2001 0.99234 2002 1.58788 2003 2.55882 2004 3.88622 2005 6.07946 2006 7.52688 2007 8.26 2008 10.01 2009 20.07 2010 26.9 2011 31.52 2012 36.94 2013 43.3 2014 44 2015 47.56976 2016 59.26 2017 60.49126