Year	Per 100 People
1975	8.28477
1976	9.25732
1977	10.10292
1978	11.01056
1979	12.01695
1980	12.96244
1981	13.97939
1982	14.49236
1983	15.17241
1984	16.40159
1985	17.61295
1986	18.80483
1987	20.30141
1988	22.08669
1989	23.31759
1990	27.9191
1991	29.07878
1992	30.56208
1993	30.23834
1994	30.90267
1995	32.41294
1996	33.71817
1997	33.54313
1998	33.47361
1999	34.19195
2000	34.21909
2001	33.90712
2002	33.62707
2003	32.02253
2004	29.44355
2005	27.55883
2006	27.64231
2007	27.04511
2008	25.41303
2009	24.30635
2010	23.96808
2011	22.28618
2012	19.101
2013	17.91509
2014	22.3741
2015	22.13299
2016	22.18014
2017	21.39533