Year	Per 1000 Births
1970	20.9
1971	20
1972	19.1
1973	18.2
1974	17.4
1975	16.6
1976	15.8
1977	15.1
1978	14.3
1979	13.7
1980	13.1
1981	12.5
1982	11.9
1983	11.4
1984	11
1985	10.5
1986	10.1
1987	9.7
1988	9.4
1989	9
1990	8.6
1991	8.3
1992	8
1993	7.7
1994	7.4
1995	7.1
1996	6.8
1997	6.5
1998	6.3
1999	6.1
2000	5.9
2001	5.7
2002	5.5
2003	5.3
2004	5.1
2005	4.9
2006	4.7
2007	4.5
2008	4.3
2009	4.2
2010	4
2011	3.9
2012	3.7
2013	3.6
2014	3.4
2015	3.3