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 0.01125 1986 0.01585 1987 0.02896 1988 0.05886 1989 0.11568 1990 0.46563 1991 0.99383 1992 1.36915 1993 2.10946 1994 3.91257 1995 6.85178 1996 11.22145 1997 20.52623 1998 35.84904 1999 52.98357 2000 73.73583 2001 89.11361 2002 93.76877 2003 97.6318 2004 107.27467 2005 121.5811 2006 136.11743 2007 151.40058 2008 151.82753 2009 150.95588 2010 156.81632 2011 160.71122 2012 162.70281 2013 162.33678 2014 150.89972 2015 147.3698 2016 144.63401 2017 141.29327