Year	Per 100 People
1970	2.53361
1975	2.6533
1976	2.62848
1981	4.79019
1982	5.5212
1983	6.97944
1984	8.19512
1985	10.03124
1986	11.62639
1987	14.00251
1988	16.40371
1989	19.51161
1990	23.95946
1991	20.30992
1992	24.58094
1993	27.46719
1994	33.85993
1995	35.16755
1996	37.02332
1997	39.87702
1998	42.5793
1999	44.60412
2000	45.82217
2001	43.81062
2002	44.10312
2003	43.53155
2004	43.05607
2005	40.87258
2006	41.52778
2007	41.4747
2008	41.09085
2009	39.91195
2010	38.37061
2011	37.07101
2012	34.26331
2013	33.87001
2014	20.14159
2015	20.01541
2016	22.28935