Year	per 1,000 people
1980	12.0663995742798
1985	12.7760000228882
1986	12.7692003250122
1987	12.8029003143311
1988	12.8053998947144
1989	12.6358003616333
1990	12.4871997833
1991	12.4653997421
1992	12.0453996658
1993	11.9105997086
1994	11.2838001251
1995	11.0900001526
1996	10.8800001144
1997	10.1899995804
1998	10.029999733
1999	9.8500003815
2000	8.83
2001	8.33
2002	8.1
2003	7.85
2004	7.57
2005	7.28
2006	7.16
2007	7.19
2008	7.18
2009	7.18
2010	7.16
2011	7.43
2012	7.45
2013	7.31
2014	7.26
2015	6.97
2016	6.69
2017	6.56
2018	6.43