Development and change

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

30 (1999)	?	?	2	?	?	?
33 (2002)	?	?	?	?	1	?
37 (2006)	?	?	?	1	?	?
38 (2007)	6	3	1	5	1	7
39 (2008)	2	4	?	3	3	5
40 (2009)	2	?	4	1	2	?
41 (2010)	1	2	?	1	2	?
42 (2011)	?	2	2	?	1	?
43 (2012)	?	?	?	1	?	?
53 (2022)	?	?	?	?	?	1