Table 2 The standard error for article volumes in 2014, average number of articles per journal, average APC for journals and articles, and average and median publication time for journals and articles

Total article volumes published in 2014

90,954

Average number of articles per journal

2010

30

5

2011

42

9

2012

53

13

2013

49

9

2014

53

8

Average APC for journals in USD

100+ journal publisher

605

41

10–99 journal publisher

239

26

2–9 journal publisher

215

24

Single-journal publisher

98

16

Overall

304

20

Average APC for articles published (2010–2014) in USD

100+ journal publisher

796

44

10–99 journal publisher

104

15

2–9 journal publisher

133

14

Single-journal publisher

83

17

Overall

178

17

Average publication time for journals in months

100+ journal publisher

4.4

0.9

10–99 journal publisher

2.2

0.4

2–9 journal publisher

3.4

0.8

Single-journal publisher

3.9

0.7

Overall

3.6

0.4

Average publication time for articles published (2014) in months

100+ journal publisher

2.9

0.3

10–99 journal publisher

2.2

0.3

2–9 journal publisher

4.2

0.7

Single-journal publisher

4.6

0.9

Overall

3.3

0.2

Interquartile range

Median publication time for journals in months

100+ journal publisher

2.6

(2.1, 4.5)

10–99 journal publisher

2.1

(1.0, 3.0)

2–9 journal publisher

3.7

(1.8, 4.7)

Single-journal publisher

3.2

(2.6, 5.2)

Overall

2.7

(2.0, 4.2)

Median publication time for articles published (2014) in months

100+ journal publisher

2.4

(1.5, 4.3)

10–99 journal publisher

1.9

(1.1, 3.3)

2–9 journal publisher

4.2

(2.6, 5.2)

Single-journal publisher

3.4

(1.8, 5.1)

Overall

2.7

(1.5, 4.5)