Year	per 1,000 people
1960	7.512
1961	7.602
1962	7.892
1963	7.732
1964	7.624
1965	7.979
1966	8.217
1967	8.453
1968	8.634
1969	9.116
1970	9.402
1971	9.409
1972	9.682
1973	9.736
1974	9.938
1975	9.988
1976	10.15
1977	10.441
1978	10.661
1979	11.11
1980	11.369
1981	11.3
1982	11.3
1983	11.5
1984	12
1985	12.135
1986	11.1
1987	11.4
1988	11.6
1989	11.6
1990	12.1
1991	12.9
1992	13.4
1993	14.2
1994	14.7
1995	15.4
1996	15.2
1997	14.9
1998	14.4
1999	14.9
2000	15.4
2001	15.3
2002	15.7
2003	16
2004	16
2005	16.6
2006	16.2
2007	16.4
2008	16.3
2009	15.3
2010	15.2
2011	14.5
2012	14.5
2013	14.6
2014	14.7
2015	14.9
2016	14.7
2017	14.5
2018	14.8
2019	14.7
2020	15.9
2021	18.5
2022	21.4