Year	Per 100 People
1960	6.14698
1965	8.77657
1970	12.0589
1975	17.45866
1976	18.28276
1977	19.29982
1978	20.43633
1979	21.64034
1980	23.0719
1981	24.4978
1982	25.91421
1983	27.44791
1984	29.01551
1985	30.51288
1986	31.98809
1987	33.46473
1988	35.18464
1989	37.23401
1990	39.12327
1991	40.36743
1992	41.45736
1993	42.23033
1994	42.8671
1995	43.39344
1996	44.1362
1997	44.93844
1998	45.4672
1999	46.34838
2000	47.39263
2001	47.56517
2002	46.95705
2003	45.73922
2004	44.37496
2005	42.5942
2006	45.51523
2007	37.79409
2008	37.03885
2009	37.96441
2010	37.73052
2011	36.99046
2012	36.40954
2013	35.35904
2014	34.5409
2015	33.96285
2016	34.10263
2017	34.87314