Year	Per 100 People
1965	0.26849
1970	0.49435
1975	0.68773
1976	0.71595
1977	0.8339
1978	0.8269
1979	0.84356
1980	0.88613
1981	0.90903
1982	0.96016
1983	0.95298
1984	0.95522
1985	0.93931
1986	0.95925
1987	0.95269
1988	0.96974
1989	0.97902
1990	0.98476
1991	1.02024
1992	1.01511
1993	1.28996
1994	1.62619
1995	2.01851
1996	2.50119
1997	2.84405
1998	3.33576
1999	3.78909
2000	3.92528
2001	4.16127
2002	4.06988
2003	4.02255
2004	4.05946
2005	3.90296
2006	4.13758
2007	4.41251
2008	4.49152
2009	4.44585
2010	3.55865
2011	3.73219
2012	3.60616
2013	3.1974
2014	3.09008
2015	3.16939
2016	3.66043
2017	3.96813