Year	per 1,000 people
1960	6.443
1961	6.317
1962	6.278
1963	6.044
1964	5.901
1965	5.971
1966	6.118
1967	5.801
1968	5.594
1969	5.507
1970	5.427
1971	5.338
1972	5.333
1973	5.245
1974	5.233
1975	5.123
1976	5.075
1977	4.838
1978	4.657
1979	4.471
1980	4.502
1981	4.502
1982	4.48
1983	4.48
1984	4.467
1985	4.481
1986	4.493
1987	4.504
1988	4.491
1989	4.495
1990	4.486
1991	4.57
1992	4.578
1993	4.579
1994	4.629
1995	4.636
1996	4.791
1997	4.788
1998	4.774
1999	4.706
2000	4.663
2001	4.436
2002	4.411
2003	4.293
2004	4.273
2005	4.303
2006	4.437
2007	4.566
2008	4.648
2009	4.784
2010	4.947
2011	5.122
2012	5.368
2013	5.537
2014	5.71
2015	5.958
2016	6.046
2017	6.127
2018	6.21
2019	6.304
2020	7.178
2021	7.337
2022	6.55