Year	per 1,000 people
1960	11.6999998092651
1970	10.8000001907349
1980	10.1999998092651
1985	9.5
1990	8.5
1991	7.4000000954
1992	7.0999999046
1993	6.5
1994	6.6999998093
1995	6.1999998093
1996	6.0999999046
1997	6.0999999046
1998	6.1999998093
2002	6.2
2009	2.41
2010	2.75
2011	2.82
2012	2.83
2013	2.78
2014	2.76
2015	2.72
2016	2.74
2017	2.73
2018	2.62
2019	2.57