Year	Per 100 People
1960	11.59803
1965	17.87007
1970	24.14122
1975	30.22744
1976	31.13046
1977	32.59343
1978	33.78818
1979	35.00657
1980	36.16655
1981	37.00851
1982	38.01938
1983	38.90831
1984	40.20667
1985	41.30052
1986	42.61635
1987	43.57089
1988	44.68082
1989	46.6932
1990	48.11533
1991	49.63349
1992	52.68476
1993	54.13699
1994	55.37468
1995	56.22162
1996	59.93155
1997	60.89544
1998	59.88521
1999	58.33461
2000	57.06909
2001	58.30467
2002	56.00618
2003	54.77039
2004	54.22525
2005	53.4027
2006	53.35579
2007	52.28323
2008	53.72033
2009	53.11528
2010	53.63377
2011	53.68494
2012	50.09514
2013	49.12607
2014	48.7313
2015	48.8583
2016	48.0072
2017	47.18444