Year	Per 100 People
1960	0.49264
1965	0.47988
1970	0.55583
1975	0.57202
1976	0.54874
1977	0.55476
1978	0.54531
1979	0.53934
1980	0.55455
1981	0.57312
1982	0.57614
1983	0.57491
1984	0.62057
1985	0.62934
1986	0.65774
1987	0.68943
1988	0.76962
1989	0.84146
1990	0.81045
1991	0.83662
1992	0.89775
1993	0.89935
1994	0.89686
1995	0.84019
1996	0.8296
1997	0.80046
1998	0.78089
1999	0.81139
2000	0.79123
2001	0.7914
2002	0.78841
2003	0.77417
2004	0.7818
2005	0.78546
2006	0.75445
2007	0.72127
2008	0.69253
2009	0.67136
2010	0.85478
2011	0.60097
2012	0.56151
2013	0.76394
2014	0.73248
2015	0.7215
2016	0.6112
2017	0.59344