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 0.07082 1999 0.14487 2000 0.48594 2001 0.78037 2002 0.96519 2003 1.50593 2004 1.55664 2005 2.47981 2006 3.41279 2007 6.72287 2008 13.62396 2009 24.34743 2010 34.63273 2011 42.27999 2012 52.74658 2013 60.45248 2014 68.28361 2015 75.32206 2016 74.86073 2017 72.23888