Year	Per 100 People
1960	4.43597
1965	4.93641
1970	5.36853
1975	6.33368
1976	6.33754
1977	6.29498
1978	6.33484
1979	6.49099
1980	6.68543
1981	7.70407
1982	8.14427
1983	7.71192
1984	8.68826
1985	8.92071
1986	9.26592
1987	9.46793
1988	9.98806
1989	9.55877
1990	9.24765
1991	9.43316
1992	10.68048
1993	11.67496
1994	14.43044
1995	16.32859
1996	17.68123
1997	19.05119
1998	19.57824
1999	19.70955
2000	21.30261
2001	21.70031
2002	20.34494
2003	22.45891
2004	22.62035
2005	24.11944
2006	23.91319
2007	23.76769
2008	24.12644
2009	23.94186
2010	24.04967
2011	23.33954
2012	22.46169
2013	22.71298
2014	22.85277
2015	23.20047
2016	22.66639
2017	21.52728