Year	Per 1000 Births
1970	16.4
1971	15.7
1972	15
1973	14.4
1974	13.9
1975	13.4
1976	12.9
1977	12.4
1978	12
1979	11.6
1980	11.1
1981	10.7
1982	10.4
1983	10
1984	9.7
1985	9.5
1986	9.2
1987	8.9
1988	8.6
1989	8.3
1990	8
1991	7.7
1992	7.5
1993	7.2
1994	7
1995	6.7
1996	6.5
1997	6.3
1998	6.1
1999	5.9
2000	5.7
2001	5.5
2002	5.3
2003	5.1
2004	5
2005	4.8
2006	4.6
2007	4.5
2008	4.3
2009	4.2
2010	4
2011	3.9
2012	3.8
2013	3.6
2014	3.5
2015	3.4