Year	Number per 1,000 Live Births
1968-01-01	23.5
1969-01-01	22.7
1970-01-01	22
1971-01-01	21.4
1972-01-01	20.6
1973-01-01	19.7
1974-01-01	18.8
1975-01-01	17.7
1976-01-01	16.5
1977-01-01	15.5
1978-01-01	14.4
1979-01-01	13.5
1980-01-01	12.6
1981-01-01	11.8
1982-01-01	11
1983-01-01	10.4
1984-01-01	9.8
1985-01-01	9.2
1986-01-01	8.8
1987-01-01	8.2
1988-01-01	7.8
1989-01-01	7.4
1990-01-01	7.0
1991-01-01	6.5
1992-01-01	6.2
1993-01-01	5.9
1994-01-01	5.5
1995-01-01	5.3
1996-01-01	5.1
1997-01-01	4.8
1998-01-01	4.6
1999-01-01	4.5
2000-01-01	4.4
2001-01-01	4.3
2002-01-01	4.2
2003-01-01	4.1
2004-01-01	4.0
2005-01-01	3.9
2006-01-01	3.8
2007-01-01	3.7
2008-01-01	3.6
2009-01-01	3.6
2010-01-01	3.5
2011-01-01	3.4
2012-01-01	3.3
2013-01-01	3.3
2014-01-01	3.3
2015-01-01	3.3
2016-01-01	3.2
2017-01-01	3.1