Year	Per 100 People
1960	8.37822
1970	12.60504
1983	21.39354
1984	23.08326
1985	25.86487
1986	26.66311
1987	28.57719
1988	31.15477
1989	33.19322
1990	36.86051
1991	39.50774
1992	43.67405
1993	46.10607
1994	50.68741
1995	54.7882
1996	57.59989
1997	60.90083
1998	66.16668
1999	70.71731
2000	75.50032
2001	78.12839
2002	77.83414
2003	78.81463
2004	79.48959
2005	77.91803
2006	74.31261
2007	73.82344
2008	73.32274
2009	72.82437
2010	72.31312
2011	71.84553
2012	68.72676
2014	68.74669
2016	49.48558
2017	57.13749