Year	Per 100 People
1965	1.70729
1970	2.96324
1975	5.25244
1976	5.533
1977	6.39894
1978	6.88218
1979	9.71709
1980	11.45356
1981	12.19582
1982	13.08537
1983	14.3709
1984	15.79709
1985	16.52171
1986	16.81892
1987	16.72261
1988	17.84085
1989	18.23713
1990	18.95324
1991	19.73086
1992	21.51267
1993	23.19097
1994	24.71906
1995	24.98674
1996	24.9523
1997	25.60015
1998	25.68331
1999	25.97915
2000	25.72561
2001	24.9237
2002	23.8654
2003	23.85429
2004	23.0829
2005	21.76417
2006	20.26222
2007	19.64888
2008	19.77283
2009	20.0839
2010	18.37432
2011	21.63261
2012	23.02816
2013	22.1603
2014	21.30235
2015	20.4187
2016	19.63722
2017	19.11571