Year	Per 100 People
1960	0.14869
1965	0.18881
1970	0.241
1975	0.31143
1976	0.32988
1977	0.3411
1978	0.35522
1979	0.37847
1980	0.38812
1981	0.40513
1982	0.40471
1983	0.44547
1984	0.49434
1985	0.49412
1986	0.54537
1987	0.59368
1988	0.62734
1989	0.75746
1990	0.78321
1991	1.00796
1992	1.09328
1993	1.30919
1994	1.52793
1995	1.73195
1996	1.88726
1997	1.98131
1998	2.01205
1999	2.12251
2000	2.20429
2001	2.29659
2002	2.52704
2003	2.74024
2004	2.98595
2005	3.39669
2006	3.33559
2007	2.99764
2008	2.69898
2009	3.6781
2010	3.56419
2011	3.28487
2012	3.29485
2013	3.50601
2014	2.63967
2015	1.86799
2016	1.60681
2017	1.49239