Year	Number per 1,000 Live Births
1981-01-01	20.6
1982-01-01	19.4
1983-01-01	18.2
1984-01-01	17.0
1985-01-01	15.9
1986-01-01	14.8
1987-01-01	13.8
1988-01-01	12.8
1989-01-01	11.9
1990-01-01	11.1
1991-01-01	10.5
1992-01-01	9.9
1993-01-01	9.5
1994-01-01	9.0
1995-01-01	8.7
1996-01-01	8.3
1997-01-01	8.1
1998-01-01	7.7
1999-01-01	7.4
2000-01-01	7.2
2001-01-01	6.9
2002-01-01	6.6
2003-01-01	6.4
2004-01-01	6.0
2005-01-01	5.8
2006-01-01	5.5
2007-01-01	5.3
2008-01-01	5.1
2009-01-01	4.9
2010-01-01	4.7
2011-01-01	4.5
2012-01-01	4.5
2013-01-01	4.3
2014-01-01	4.2
2015-01-01	4.1
2016-01-01	4.0
2017-01-01	3.9