Year	Per 100 People
1960	9.65778
1965	13.28635
1970	18.71057
1975	28.67285
1976	30.20422
1977	31.45189
1978	32.80616
1979	34.49761
1980	36.33805
1981	38.21354
1982	39.87508
1983	41.56573
1984	43.04239
1985	44.58519
1986	46.08201
1987	47.81281
1988	49.78748
1989	51.87744
1990	53.43431
1991	54.1449
1992	54.35256
1993	54.48042
1994	54.95285
1995	54.89348
1996	55.32435
1997	55.53457
1998	55.02254
1999	55.0685
2000	54.91199
2001	53.95988
2002	52.28107
2003	49.12075
2004	45.172
2005	40.31241
2006	36.1909
2007	32.8425
2008	31.01561
2009	26.76576
2010	23.29577
2011	20.03992
2012	16.43272
2013	13.83581
2014	11.70024
2015	9.7994
2016	8.30981
2017	6.84744