Year	Per 100 People
1981	2.21955
1982	2.25536
1983	2.27296
1984	2.29152
1985	2.31205
1986	2.33511
1987	2.36003
1988	2.44702
1989	2.46917
1990	2.51741
1991	2.53968
1992	3.92583
1993	4.24623
1994	4.3842
1995	4.584
1996	4.81717
1997	4.90772
1998	4.90227
1999	4.89195
2000	4.87945
2001	5.5079
2002	6.67452
2003	7.47881
2004	9.1696
2005	10.83761
2010	4.29634
2012	4.37117
2013	4.39407
2014	6.12512
2015	5.91095
2016	4.96041
2017	4.3036