Year Per 100 People 1965 0.71504 1970 1.04939 1975 1.56928 1976 1.62405 1977 1.66425 1978 1.69667 1979 1.69574 1980 1.74441 1981 1.80778 1982 1.81884 1983 1.9379 1984 2.01199 1985 2.11215 1986 2.227 1987 2.22035 1988 2.34052 1989 2.4834 1990 2.58631 1991 2.42297 1992 2.69917 1993 2.90293 1994 3.27016 1995 4.61434 1996 5.87187 1997 6.62945 1998 6.17107 1999 6.60373 2000 6.62599 2001 5.982 2002 6.22757 2003 6.82747 2004 8.04306 2005 8.70188 2006 9.15648 2007 10.05315 2008 10.73748 2009 12.23595 2010 10.75755 2011 10.92219 2012 11.32492 2013 10.48853 2014 9.79085 2015 9.27917 2016 9.67609 2017 9.58181