Year Per 100 People 1965 0.91426 1970 1.48208 1975 2.3614 1976 2.45146 1977 2.50874 1978 2.64132 1979 2.79184 1980 2.84588 1981 2.95361 1982 3.09439 1983 3.07799 1984 2.9929 1985 2.96859 1986 3.08871 1987 3.52946 1988 3.93862 1989 4.55188 1990 4.80039 1991 4.69739 1992 4.96325 1993 5.46321 1994 5.87787 1995 6.10047 1996 6.85381 1997 7.55039 1998 8.14577 1999 9.11006 2000 9.6957 2001 10.39288 2002 10.79443 2003 11.51803 2004 11.77496 2005 12.22817 2006 12.70975 2007 12.83394 2008 13.19585 2009 13.70353 2010 13.9652 2011 14.56517 2012 14.97226 2013 15.29077 2014 15.35354 2015 15.56368 2016 14.96254 2017 14.52767