Year	Per 100 People
1960	4.27282
1965	5.50541
1970	8.3725
1975	13.05895
1976	14.07084
1977	15.44737
1978	16.65423
1979	17.8686
1980	19.12543
1981	20.10493
1982	20.92861
1983	21.94965
1984	22.95725
1985	24.0511
1986	25.11751
1987	26.20875
1988	28.03062
1989	30.07811
1990	32.06271
1991	33.66315
1992	34.90314
1993	35.95853
1994	36.93089
1995	37.84204
1996	38.52298
1997	39.50618
1998	40.42576
1999	40.65254
2000	41.81528
2001	42.35349
2002	42.01626
2003	41.63598
2004	41.36975
2005	44.18635
2006	44.41543
2007	44.4829
2008	44.73272
2009	43.55857
2010	43.13318
2011	42.39907
2012	41.77488
2013	41.51019
2014	41.34945
2015	41.75579
2016	42.35543
2017	42.45769