Year Per 100 People 1960 0 1965 0 1970 0 1975 0 1976 0 1977 0 1978 0 1979 0 1980 0 1981 0 1982 0 1983 0 1984 0 1985 0 1986 0 1987 0 1988 0 1989 0 1990 0 1991 0 1992 0 1993 0 1994 0 1995 0 1996 0.00888 1997 0.01495 1998 0.03307 1999 0.04886 2000 0.0844 2001 0.37161 2002 0.66521 2003 1.79112 2004 3.47362 2005 5.91338 2006 14.81671 2007 25.45678 2008 36.38686 2009 45.58577 2010 52.61807 2011 71.2485 2012 76.85037 2013 75.05546 2014 73.65699 2015 72.29003 2016 70.258 2017 70.66811