Year Per 100 People 1960 0.90018 1965 1.01799 1970 1.31128 1975 2.04553 1976 2.27741 1977 2.71113 1978 3.21861 1979 3.62513 1980 4.08551 1981 4.29732 1982 4.58647 1983 4.85054 1984 5.04515 1985 5.30787 1986 5.3798 1987 5.52828 1988 5.74299 1989 5.99215 1990 6.29988 1991 6.62992 1992 7.01391 1993 7.19328 1994 7.68228 1995 8.17207 1996 9.1599 1997 10.16969 1998 11.74501 1999 14.46232 2000 17.64316 2001 21.05802 2002 21.54342 2003 21.48429 2004 21.42429 2005 21.32097 2006 20.52786 2007 20.6252 2008 21.36773 2009 21.29187 2010 21.41373 2011 21.65512 2012 22.09068 2013 22.25109 2014 21.60889 2015 21.2064 2016 20.22796 2017 19.53192