Year	Per 100 People
1960	3.06703
1965	3.39912
1970	4.46242
1975	6.83228
1976	6.93145
1977	7.78369
1978	8.12747
1979	8.51779
1980	9.12198
1981	9.63945
1982	10.38379
1983	11.02502
1984	11.7123
1985	11.98215
1986	12.83028
1987	13.62975
1988	14.65465
1989	16.00517
1990	16.71624
1991	18.14247
1992	19.77975
1993	21.3106
1994	22.33658
1995	22.92484
1996	23.34542
1997	23.77338
1998	24.12528
1999	24.28397
2000	23.96052
2001	23.3639
2002	23.52005
2003	23.07644
2004	23.28963
2005	23.77023
2006	24.44647
2007	25.07361
2008	25.8448
2009	27.25241
2010	28.7607
2011	29.92103
2012	30.97474
2013	32.4565
2014	33.33371
2015	28.88205