Year Percent 1990 0 1996 0.00206 1997 0.01009 1998 0.01979 1999 0.06091 2000 0.14255 2001 0.1859 2002 0.22705 2003 0.31036 2004 0.43282 2005 0.50706 2006 0.72963 2007 0.81 2008 1.57 2009 1.8 2010 2 2011 2.2 2012 2.8 2013 3.5 2014 7 2015 10.33 2016 11.11219