Year	Per 100 People
1975	6.70725
1976	7.26749
1977	8.49075
1978	9.00777
1979	9.51099
1980	9.6782
1981	10.80019
1982	11.27224
1983	11.73349
1984	12.17436
1985	12.59017
1986	12.97072
1987	13.61552
1988	14.29529
1989	14.9867
1990	15.82741
1991	16.32123
1992	16.80023
1993	17.34888
1994	17.87984
1995	18.11433
1996	18.29106
1997	18.12271
1998	17.90468
1999	17.61716
2000	17.3765
2001	17.42105
2002	17.8927
2003	18.67844
2004	19.29516
2005	19.93802
2006	20.41237
2007	21.2986
2008	21.54583
2009	20.76796
2010	20.58519
2011	20.41128
2012	20.25332
2013	19.9913
2014	19.70849
2015	18.90214
2016	18.17632
2017	17.23933