Year	per 1000 people
1960	1
1961	1
1962	1.1
1963	1.1
1964	1.2
1965	1.2
1966	1.3
1967	1.3
1968	1.4
1969	1.4
1970	1.4
1971	1.5
1972	1.5
1973	1.5
1974	1.6
1975	1.6
1976	1.6
1977	1.7
1978	1.7
1979	1.7
1980	1.8
1981	1.8
1982	1.8
1983	1.9
1984	1.9
1985	2
1986	2
1987	2.1
1988	2.1
1989	2.1
1990	2.1
1991	2.2
1992	2.2
1993	2.2
1994	2.3
1995	2.3
1996	2.4
1997	2.4
1998	2.3
1999	2.3
2000	2.2
2001	2.3
2002	2.3
2003	2.469
2005	1.97
2006	2.012
2008	2.144
2010	2.157
2011	2.182
2012	2.202
2013	2.207
2014	2.271
2015	2.29