Rank	Countries/Territories	Count	Percent
1	United States	331	29.9%
2	China	253	22.8%
3	India	181	16.3%
4	Germany	36	3.2%
5	Brazil	32	2.9%
6	Japan	28	2.5%
7	Russia	20	1.8%
8	United Kingdom	20	1.8%
9	Zambia	19	1.7%
10	Netherlands	17	1.5%
11	Australia	16	1.4%
12	Korea, Republic of	15	1.4%
13	Pakistan	13	1.2%
14	Italy	12	1.1%
15	Canada	12	1.1%
16	Iran, Islamic Republic of	12	1.1%
17	Colombia	9	0.8%
18	South Africa	7	0.6%
19	Switzerland	7	0.6%
20	Turkey	6	0.5%
21	Ireland	6	0.5%
22	Israel	6	0.5%
23	Portugal	6	0.5%
24	Ethiopia	5	0.5%
25	Romania	5	0.5%
26	Singapore	3	0.3%
27	France	3	0.3%
28	Denmark	2	0.2%
29	Peru	2	0.2%
30	Argentina	2	0.2%
31	Mexico	2	0.2%
32	Taiwan	2	0.2%
33	Thailand	2	0.2%
34	Ukraine	1	0.1%
35	Sweden	1	0.1%
36	Morocco	1	0.1%
37	Lithuania	1	0.1%
38	Malaysia	1	0.1%
39	Philippines	1	0.1%
40	Norway	1	0.1%
41	Oman	1	0.1%
42	Qatar	1	0.1%
43	Rwanda	1	0.1%
44	Egypt	1	0.1%
45	Czech Republic	1	0.1%
46	Bangladesh	1	0.1%
47	Belgium	1	0.1%
48	Guatemala	1	0.1%
49	Hong Kong	1	0.1%