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 0.00183 1989 0.01016 1990 0.07489 1991 0.18479 1992 0.35197 1993 0.42619 1994 0.61641 1995 0.73211 1996 1.06796 1997 1.78946 1998 3.38942 1999 7.70846 2000 13.83988 2001 21.1101 2002 24.84607 2003 28.4907 2004 35.93712 2005 43.44775 2006 50.31725 2007 59.51505 2008 66.25222 2009 72.02581 2010 77.89321 2011 79.42165 2012 83.36393 2013 87.11513 2014 84.48477 2015 85.54092 2016 87.60369 2017 88.51343