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 1990 0.04407 1991 0.07651 1992 0.09627 1993 0.13616 1994 0.27073 1995 0.70928 1996 1.0281 1997 1.73446 1998 2.5238 1999 5.03533 2000 8.23849 2001 14.60347 2002 19.25446 2003 23.32705 2004 27.83768 2005 39.22342 2006 49.14623 2007 58.00352 2008 74.82455 2009 88.35001 2010 89.84438 2011 87.4708 2012 87.97873 2013 89.48687 2014 79.79685 2015 83.55735 2016 81.77577 2017 81.44449