History compass

Articles in SafetyLit
Y-Axis = Volume :: X-Axis = Issue
?=unknown status :: X=no issue published :: nn=articles from issue :: A=relevant article(s) IDed to add
S=searched, nothing relevant :: O=issue published but not yet searched :: C=combination issue

	1	2	3	4	5	6	7	8	9

2 (2004)	2	?	?	?	?	?	?	?	?
4 (2006)	1	?	?	?	1	?	?	?	?
5 (2007)	4	7	7	12	6	7	?	?	?
6 (2008)	12	7	6	3	4	2	?	?	?
7 (2009)	2	2	6	2	2	3	?	?	?
8 (2010)	?	1	?	1	?	1	1	?	?
10 (2012)	?	?	?	?	?	?	?	?	1
12 (2014)	?	?	?	?	?	?	?	1	?