Year	Per 100 People
1970	2.98435
1975	4.86573
1976	5.42073
1977	5.88156
1978	6.64
1979	7.24704
1980	7.87277
1981	8.5688
1982	9.53629
1983	10.70753
1984	11.50544
1985	12.29825
1986	13.08583
1987	13.87093
1988	14.76049
1989	15.77039
1990	17.2304
1991	18.72303
1992	20.16995
1993	21.87168
1994	25.87529
1995	27.878
1996	30.36197
1997	32.83173
1998	34.68395
1999	36.65631
2000	38.86881
2001	40.40308
2002	41.51672
2003	42.63666
2004	43.05736
2005	42.99853
2006	41.89376
2007	42.3335
2008	43.15017
2009	42.82778
2010	43.10682
2011	42.84424
2012	40.58023
2013	38.99815
2014	36.85188
2015	34.85601
2016	34.08229
2017	33.45037