Year	Per 100 People
1960	0
1965	0.09825
1970	0.12906
1975	0.16287
1976	0.18536
1977	0.17947
1978	0.17385
1979	0.27681
1980	0.29083
1981	0.28546
1982	0.30159
1983	0.31685
1984	0.31958
1985	0.32108
1986	0.3313
1987	0.32971
1988	0.32865
1989	0.34662
1990	0.34824
1991	0.4653
1992	0.5567
1993	0.72814
1994	0.88518
1995	1.0183
1996	1.16969
1997	1.21607
1998	1.9251
1999	2.15051
2000	2.4668
2001	2.9771
2002	3.23467
2003	3.79463
2004	4.72995
2005	5.02559
2006	4.68978
2007	4.34626
2008	3.91968
2009	3.68783
2010	3.61332
2011	3.71231
2012	3.58648
2013	3.46227
2014	3.0682
2015	2.77005
2016	2.64251
2017	2.64534