Table 2.

The top 10 productive countries/regions

Rank	Country	No. of articles	% from (1052)	Total citations	Citation per publication
1	USA	317	30.13	10548	33.27
2	India	86	8.17	3324	38.65
3	China	60	5.70	1153	19.22
4	UK	58	5.51	3354	57.83
5	Spain	48	4.56	830	17.29
6	Brazil	44	4.18	836	19.00
7	Germany	30	2.85	311	10.37
8	Italy	28	2.66	477	17.04
9	Canada	26	2.47	743	28.58
10	South Africa	22	2.09	405	18.41