Rank  Country  Number of publications with at least one author from the country  SCImago country rank
1  China  11,519  2
2  United States of America  9,666  1
3  Italy  7,261  6
4  United Kingdom  4,362  3
5  France  3,459  9
6  India  2,568  10
7  Spain  1,765  11
8  Canada  1,679  7
9  Germany  1,596  4
10  Iran  1,349  17
11  Australia  1,317  8
12  Singapore  1,307  34
13  Brazil  1,026  14
14  Turkey  924  16
15  Switzerland  796  15
16  Netherlands  753  12
17  Japan  717  5
18  Taiwan  643  23
19  Belgium  529  20
20  Israel  459  26