Year	Per 100 People
1960	2.17615
1976	2.06407
1977	2.0447
1978	2.01825
1979	2.15806
1981	2.34819
1982	2.45828
1983	2.55851
1984	2.56063
1985	2.66389
1986	2.83042
1987	3.60677
1988	3.40381
1989	2.89998
1990	3.1813
1991	3.17958
1992	3.13923
1993	3.23324
1994	3.22076
1995	3.23823
1996	3.24932
1997	3.36663
1998	3.5036
1999	3.90425
2000	4.38183
2001	5.13488
2002	5.93367
2003	6.4408
2004	6.81814
2005	7.58542
2006	8.51233
2007	9.33428
2008	9.6208
2009	9.89332
2010	10.26754
2011	10.51036
2012	10.68798
2013	10.84173
2014	11.05632
2015	11.30624
2016	11.51973
2017	11.74776