Year	Per 100 People
1960	1.45812
1965	2.42195
1970	4.56628
1975	7.76883
1976	8.52991
1977	9.27836
1978	9.98796
1979	10.71158
1980	11.48387
1981	12.16142
1982	12.8553
1983	13.59158
1984	14.41945
1985	15.27287
1986	16.50305
1987	17.43413
1988	18.60992
1989	19.93734
1990	21.12981
1991	22.0154
1992	22.56696
1993	23.38689
1994	24.59836
1995	25.94652
1996	27.54432
1997	29.45221
1998	31.30353
1999	32.65868
2000	33.91528
2001	33.15486
2002	27.16882
2003	24.13984
2004	24.25349
2005	23.95483
2006	23.98414
2007	24.52189
2008	24.41761
2009	23.5868
2010	24.11929
2011	23.11482
2012	22.23705
2013	20.88489
2014	19.80839
2015	19.16552
2016	18.25397
2017	16.84585