Year	Per 100 People
1960	0.23061
1965	0.24931
1970	0.29714
1975	0.30897
1976	0.31079
1977	0.31265
1978	0.31445
1979	0.32052
1980	0.36047
1981	0.43221
1982	0.454
1983	0.46736
1984	0.50635
1985	0.54195
1986	0.56094
1987	0.58465
1988	0.6132
1989	0.61647
1990	0.70046
1991	0.71743
1992	0.76381
1993	0.88001
1994	0.99857
1995	1.1199
1996	1.38824
1997	1.84895
1998	2.81911
1999	3.58407
2000	4.0859
2001	4.37367
2002	4.63348
2003	4.8868
2004	5.11672
2005	6.37143
2006	9.57836
2007	13.84124
2008	17.27885
2009	17.11553
2010	17.71661
2011	17.76219
2012	16.88845
2013	13.18632
2014	13.13957
2015	15.87173
2016	11.92299
2017	12.46917