Year	Per 100 People
1960	1.31271
1965	1.53056
1970	1.84428
1975	2.80509
1976	2.95513
1977	3.09331
1978	3.21788
1979	3.43358
1980	3.76589
1981	3.76278
1982	3.85455
1983	3.87078
1984	4.11513
1985	4.19146
1986	4.6246
1987	4.71107
1988	4.9321
1989	5.40611
1990	5.82259
1991	6.19955
1992	6.66326
1993	7.15167
1994	7.76721
1995	8.35231
1996	8.92545
1997	9.05494
1998	9.61284
1999	10.1077
2000	10.65059
2001	11.32645
2002	11.95489
2003	12.4932
2004	12.83063
2005	13.68833
2006	13.89878
2007	14.5955
2008	15.30818
2009	16.05485
2010	15.09913
2011	14.97487
2012	10.12104
2013	7.9827
2014	8.55153
2015	8.13373
2016	8.25382
2017	8.38783