Year	Per 100 People
1960	3.00209
1965	4.58887
1970	7.82171
1975	10.99279
1976	11.70447
1977	12.58642
1978	13.01393
1979	13.44271
1980	13.69541
1981	13.8146
1982	15.04485
1983	16.46917
1984	18.04517
1985	18.94625
1986	20.1343
1987	21.36555
1988	23.00998
1989	25.4812
1990	27.70668
1991	29.8448
1992	30.54916
1993	31.36087
1994	32.33756
1995	34.01734
1996	36.30378
1997	40.62897
1998	42.18362
1999	42.76333
2000	45.88971
2001	47.64062
2002	48.99108
2003	49.21802
2004	49.70211
2005	49.22393
2006	48.81526
2007	48.61887
2008	48.6804
2009	48.73056
2010	49.17784
2011	50.13097
2012	50.91109
2013	52.64788
2014	47.91185
2015	52.61191
2016	49.0235
2017	48.87494