Year	Per 1000 Births
1970	20.6
1971	20.1
1972	19.5
1973	19
1974	18.5
1975	17.9
1976	17.4
1977	16.9
1978	16.4
1979	15.8
1980	15.3
1981	14.8
1982	14.3
1983	13.8
1984	13.3
1985	12.8
1986	12.4
1987	11.9
1988	11.5
1989	11.1
1990	10.7
1991	10.4
1992	10
1993	9.6
1994	9.3
1995	8.9
1996	8.6
1997	8.3
1998	8
1999	7.7
2000	7.4
2001	7.1
2002	6.9
2003	6.6
2004	6.4
2005	6.1
2006	5.9
2007	5.7
2008	5.5
2009	5.3
2010	5.1
2011	5
2012	4.8
2013	4.6
2014	4.5
2015	4.3