Year	Per 100 People
1960	27.92233
1965	37.78884
1970	44.73045
1975	51.34592
1976	52.97176
1977	54.48026
1978	55.51251
1979	56.36143
1980	57.9582
1981	58.79592
1982	59.61876
1983	60.20792
1984	61.47866
1985	62.72691
1986	64.0788
1987	65.08091
1988	66.16823
1989	67.13486
1990	68.26705
1991	69.06557
1992	68.25347
1993	67.56775
1994	67.82043
1995	68.04792
1996	68.08748
1997	70.51645
1998	72.02243
1999	68.66822
2000	68.18561
2001	66.91547
2002	65.56665
2003	64.57075
2004	63.2658
2005	62.34357
2006	60.98108
2007	60.02242
2008	57.79001
2009	55.18883
2010	50.41955
2011	47.35108
2012	43.69693
2013	40.8562
2014	38.99703
2015	36.40745
2016	31.55573
2017	28.19597