Year	Per 100 People
1970	15.31059
1975	20.0098
1976	21.11811
1977	22.39723
1978	23.19078
1979	24.60502
1980	25.67752
1984	36.19695
1985	38.02102
1986	38.41786
1987	41.28591
1988	42.37288
1989	45.25572
1990	49.30028
1991	44.99676
1992	46.537
1993	48.91084
1994	58.59258
1995	61.28442
1997	53.44832
1998	73.32538
1999	79.15746
2000	83.95903
2001	87.7274
2002	84.93898
2003	82.55844
2004	80.33996
2005	78.15392
2006	75.95291
2007	68.08073
2008	67.57737
2009	66.60219
2010	67.29061
2011	65.80003
2012	65.00356
2013	62.90281
2014	55.60569
2015	55.92449
2016	56.14416