• Volume 39 Number 2 April 2018
• Volume 39 Number 1 February 2018

• Volume 38 Number 6 December 2017
• Volume 38 Number 5 October 2017
• Volume 38 Number 4 August 2017
• Volume 38 Number 3 June 2017
• Volume 38 Number 2 April 2017
• Volume 38 Number 1 February 2017

• Volume 37 Number 6 December 2016
• Volume 37 Number 5 October 2016
• Volume 37 Number 4 August 2016
• Volume 37 Number 3 June 2016
• Volume 37 Number 2 April 2016
• Volume 37 Number 1 February 2016

• Volume 36 Number 6 December 2015
• Volume 36 Number 5 October 2015
• Volume 36 Number 4 August 2015
• Volume 36 Number 3 June 2015
• Volume 36 Number 2 April 2015
• Volume 36 Number 1 February 2015

• Volume 35 Number 6 December 2014
• Volume 35 Number 5 October 2014
• Volume 35 Number 4 August 2014
• Volume 35 Number 3 June 2014
• Volume 35 Number 2 April 2014
• Volume 35 Number 1 February 2014

• Volume 34 Number 6 December 2013
• Volume 34 Number 5 October 2013
• Volume 34 Number 4 August 2013
• Volume 34 Number 3 June 2013
• Volume 34 Number 2 April 2013
• Volume 34 Number 1 February 2013

• Volume 33 Number 6 December 2012
• Volume 33 Number 5 October 2012
• Volume 33 Number 4 August 2012
• Volume 33 Number 3 June 2012
• Volume 33 Number 2 April 2012
• Volume 33 Number 1 February 2012

• baseline 2011 Volume 32, no. 1-6

• baseline 2010 Volume 31, no. 1-6

• baseline 2009 Volume 30, no. 1-6

• baseline 2008 Volume 29, no. 1-6

• baseline 2007 Volume 28, no. 1-6

• baseline 2006 Volume 27, no. 1-6

• baseline 2005 Volume 26, no. 1-6

• baseline 2004 Volume 25, no. 1-6

• baseline 2003 Volume 24, no. 1-6

• baseline 2002 Volume 23, no. 1-6

• baseline 2001 Volume 22, no. 1-5

• baseline 2000 Volume 21, no. 1-5

• baseline 1999 Volume 20, no. 1-6

• baseline 1998 Volume 19, no. 1-6

• baseline 1997 Volume 18, no. 1-6

• baseline 1996 Volume 17, no. 1-6

• baseline 1995 Volume 16, no. 1-6

• baseline 1994 Volume 15, no. 1-6

• baseline 1993 Volume 14, no. 1-6

• baseline 1992 Volume 13, no. 1-6

• baseline 1991 Volume 12, no. 1-6

• baseline 1990 Volume 11, no. 1-6

• baseline 1989 Volume 10, no. 1-6

• baseline 1988 Volume 9, no. 1-6

• baseline 1987 Volume 8, no. 1-6

• baseline 1986 Volume 7, no. 1-6

• baseline 1985 Volume 6, no. 1-6

• baseline 1984 Volume 5, no. 1-6

• baseline 1983 Volume 4, no. 1-6

• baseline 1982 Volume 3, no. 1-6

• baseline 1981 Volume 2, no. 1-2, 3 Supplement

• baseline 1980 Volume 1, no. 1