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 1997 0 1998 0 1999 0 2000 0.2616 2001 0.56751 2002 1.35157 2003 2.17738 2007 12.90019 2008 16.36235 2009 18.38276 2010 30.96589 2011 32.32153 2012 32.66282 2013 57.78611 2014 67.19439 2015 78.16748 2016 84.89871