Year	Per 100 People
1980	1.8677
1981	1.91635
1982	1.94775
1983	2.01614
1984	2.11129
1985	2.21457
1986	2.23646
1987	2.85899
1988	3.28827
1989	4.03241
1990	4.74969
1991	5.60419
1992	6.41999
1993	6.96293
1994	7.16426
1995	7.3819
1996	7.70385
1997	8.62855
1998	9.30744
1999	9.80822
2000	10.44264
2001	10.98231
2002	10.2913
2003	10.13418
2004	9.91166
2005	9.70225
2006	9.57202
2007	9.53758
2008	10.22891
2009	9.88377
2010	10.23352
2011	10.96818
2012	11.11721
2013	11.39009
2014	11.78289
2015	12.39475
2016	12.6314
2017	12.35119