Year	Per 100 People
1980	0.20885
1981	0.28659
1982	0.44279
1983	0.54745
1984	0.6122
1985	0.68528
1986	0.72739
1987	0.76371
1988	0.78994
1989	0.80533
1990	1.03272
1991	1.03417
1992	1.07599
1993	1.14938
1994	1.177
1995	1.21835
1996	1.28829
1997	1.34241
1998	1.47675
1999	1.63594
2000	1.93966
2001	2.29595
2002	2.8659
2003	3.56531
2004	3.9866
2005	4.37928
2006	4.5761
2007	4.6985
2008	4.29855
2009	4.33951
2010	4.43204
2011	4.43259
2012	4.43196
2013	4.46898
2014	4.45243
2015	4.24364
2016	4.22643