Year Percent 1990 0 1995 0.00002 1996 0.0017 1997 0.00497 1998 0.00966 1999 0.01254 2000 0.01526 2001 0.03716 2002 0.0724 2003 0.10581 2004 0.15533 2005 0.21966 2006 0.31059 2007 0.37 2008 0.45 2009 0.54 2010 0.75 2011 1.1 2012 2.9 2013 4.6 2014 7.7 2015 13.85518 2016 15.36692