Year

number of papers published

number of core papers published

proportion

2006

228

35

15.35%

2007

256

20

7.81%

2008

302

18

5.96%

2009

271

18

6.64%

2010

224

16

7.14%

2011

211

14

6.64%

2012

209

14

6.70%

2013

192

15

7.81%

2014

181

20

11.05%

2015

146

14

9.59%

2016

21

5

23.81%

totally

2241

189

8.43%