Year	per 1,000 people
1960	5.92977905273438
1970	10.2215995788574
1980	8.53470039367676
1990	8.3999996185
1993	1.2676000595
1995	7.4
1996	7.5599999428
2003	7.3
2004	7.3
2005	6.7
2006	6.6
2008	7.6
2009	6.8
2010	6.76
2012	6.34
2013	6.34
2014	5.93
2015	5.9
2016	5.89
2017	5.97