Year	Number per 1,000 Live Births
1970-01-01	31.2
1971-01-01	29.9
1972-01-01	28.8
1973-01-01	27.7
1974-01-01	26.7
1975-01-01	25.8
1976-01-01	25.1
1977-01-01	24.5
1978-01-01	24
1979-01-01	23.6
1980-01-01	23.2
1981-01-01	22.8
1982-01-01	22.4
1983-01-01	22
1984-01-01	21.6
1985-01-01	21.1
1986-01-01	20.5
1987-01-01	19.9
1988-01-01	19.2
1989-01-01	18.8
1990-01-01	18.5
1991-01-01	18.4
1992-01-01	18.5
1993-01-01	18.7
1994-01-01	18.8
1995-01-01	18.7
1996-01-01	18.5
1997-01-01	18.2
1998-01-01	17.8
1999-01-01	17.2
2000-01-01	16.6
2001-01-01	15.8
2002-01-01	14.8
2003-01-01	13.9
2004-01-01	12.9
2005-01-01	11.9
2006-01-01	11.1
2007-01-01	10.3
2008-01-01	9.7
2009-01-01	9.2
2010-01-01	8.9
2011-01-01	8.7
2012-01-01	8.4
2013-01-01	8.1
2014-01-01	7.8
2015-01-01	7.3
2016-01-01	6.9
2017-01-01	6.5