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 0.02981 1994 0.08779 1995 0.24015 1996 0.41027 1997 0.7012 1998 2.37275 1999 8.77852 2000 12.6734 2001 14.524 2002 14.9625 2003 19.25451 2004 30.53904 2005 40.0028 2006 63.5949 2007 100.88611 2008 113.75386 2009 123.28344 2010 124.91165 2011 134.2926 2012 139.0236 2013 143.8525 2014 146.36309 2015 147.86795 2016 151.89411 2017 156.51327