Year	Per 100 People
1975	3.701
1976	3.98702
1977	4.60505
1978	4.86746
1979	5.28607
1980	5.52779
1981	6.24068
1982	6.45714
1983	6.66452
1984	6.86228
1985	7.05022
1986	7.37612
1987	7.6884
1988	7.97428
1989	8.2785
1990	8.56026
1991	8.42829
1992	8.30173
1993	8.18266
1994	8.26732
1995	8.22504
1996	8.21162
1997	8.30587
1998	8.51324
1999	9.06368
2000	9.86367
2001	10.54984
2002	11.18761
2003	11.25853
2004	11.99449
2005	12.81474
2006	13.63788
2007	14.36562
2008	14.85506
2009	15.69964
2010	16.67968
2011	18.4103
2012	18.60787
2013	18.72989
2014	18.89195
2015	18.6746
2016	17.48244
2017	17.17944