Year	per 1,000 people
1961	1.1
1962	1.2
1963	1.3
1964	1.3
1965	1.3
1966	1.3
1967	1.3
1968	1.3
1969	1.4
1970	1.4
1971	1.5
1972	1.6
1973	1.6
1974	1.6
1975	1.7
1976	1.7
1977	1.7
1978	1.8
1979	1.8
1980	1.8
1981	1.8
1982	1.9
1983	1.9
1984	1.9
1985	2
1986	2
1987	2.1
1988	2.1
1989	2.1
1990	2.1
1991	2.1
1992	2.1
1993	2.2
1994	2.1
1995	2.1
1996	2.1
1997	2.1
1998	1.8611
1999	2.1
2001	1.8871
2002	1.8969
2004	1.8971
2006	1.9086
2008	1.959
2010	2.0384
2012	2.3962
2013	2.4509
2014	2.4961
2015	2.5388
2016	2.3105
2017	2.6102
2018	2.428
2019	2.435
2020	2.433
2021	2.464