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 1990 0 1996 6.37179 2002 37.15918 2007 83.70062 2008 89.82971 2009 177.83113 2010 174.56656 2011 167.00835 2012 170.83377 2013 183.80369 2014 185.08855 2015 189.93458