Year	Number per 1,000 Live Births
1981-01-01	15.5
1982-01-01	14.6
1983-01-01	13.8
1984-01-01	13
1985-01-01	12.3
1986-01-01	11.5
1987-01-01	10.8
1988-01-01	10.1
1989-01-01	9.4
1990-01-01	8.8
1991-01-01	8.2
1992-01-01	7.7
1993-01-01	7.2
1994-01-01	6.7
1995-01-01	6.3
1996-01-01	5.9
1997-01-01	5.5
1998-01-01	5.2
1999-01-01	4.9
2000-01-01	4.6
2001-01-01	4.4
2002-01-01	4.1
2003-01-01	3.9
2004-01-01	3.7
2005-01-01	3.5
2006-01-01	3.3
2007-01-01	3.1
2008-01-01	2.9
2009-01-01	2.8
2010-01-01	2.6
2011-01-01	2.4
2012-01-01	2.3
2013-01-01	2.2
2014-01-01	2.0
2015-01-01	1.9
2016-01-01	1.8
2017-01-01	1.7