Ranking

Country/Region

Number of literature/article

Centrality

1

PEOPLES R CHINA

3106

0.05

2

USA

2640

0.34

3

AUSTRALIA

513

0.05

4

ENGLAND

464

0.26

5

SOUTH KOREA

452

0.09

6

CANADA

417

0.04

7

GERMANY

335

0.03

8

TAIWAN CHINA

327

0.03

9

INDIA

281

0.11

10

SINGAPORE

212

0.01