Year	Per 1000 Births
1970	25.8
1971	24.4
1972	23
1973	21.7
1974	20.6
1975	19.5
1976	18.6
1977	17.6
1978	16.7
1979	15.9
1980	15
1981	14.2
1982	13.4
1983	12.8
1984	12.2
1985	11.6
1986	11
1987	10.4
1988	9.9
1989	9.4
1990	9
1991	8.5
1992	8.1
1993	7.7
1994	7.3
1995	6.9
1996	6.6
1997	6.3
1998	6
1999	5.7
2000	5.4
2001	5.2
2002	4.9
2003	4.7
2004	4.4
2005	4.2
2006	4
2007	3.8
2008	3.6
2009	3.4
2010	3.3
2011	3.1
2012	2.9
2013	2.8
2014	2.7
2015	2.5