Year	Per 100 People
1975	6.71961
1976	7.5859
1977	7.40633
1978	7.65632
1979	7.29626
1980	8.51177
1983	9.86273
1984	9.14788
1985	9.48874
1992	24.67613
1993	23.45348
1994	22.60739
1995	24.24341
1996	25.37893
1997	26.7425
1998	14.08706
1999	15.78034
2000	17.99396
2001	18.93485
2002	16.7004
2003	15.86929
2004	14.85536
2005	13.98972
2006	13.38543
2007	12.91899
2008	12.55046
2009	12.23343
2010	11.93779
2012	11.40884
2013	12.08167
2014	12.15211
2015	11.64856