Rank	Countries/Territories	Count	Percent
1	United States	421	32.9%
2	China	272	21.3%
3	India	188	14.7%
4	Germany	45	3.5%
5	Japan	34	2.7%
6	Brazil	32	2.5%
7	United Kingdom	25	2%
8	Australia	24	1.9%
9	Russia	22	1.7%
10	Zambia	19	1.5%
11	Korea, Republic of	17	1.3%
12	Netherlands	17	1.3%
13	Iran, Islamic Republic of	16	1.3%
14	Pakistan	14	1.1%
15	Canada	13	1%
16	Italy	12	0.9%
17	Turkey	10	0.8%
18	Singapore	9	0.7%
19	Colombia	9	0.7%
20	Portugal	7	0.5%
21	South Africa	7	0.5%
22	Switzerland	7	0.5%
23	Ireland	6	0.5%
24	Israel	6	0.5%
25	Ethiopia	5	0.4%
26	Romania	5	0.4%
27	France	3	0.2%
28	Egypt	3	0.2%
29	Denmark	2	0.2%
30	Argentina	2	0.2%
31	Peru	2	0.2%
32	Mexico	2	0.2%
33	Hong Kong	2	0.2%
34	Taiwan	2	0.2%
35	Thailand	2	0.2%
36	Ukraine	2	0.2%
37	Sweden	1	0.1%
38	Rwanda	1	0.1%
39	Guatemala	1	0.1%
40	Lithuania	1	0.1%
41	Malaysia	1	0.1%
42	Mongolia	1	0.1%
43	Morocco	1	0.1%
44	Norway	1	0.1%
45	Oman	1	0.1%
46	Philippines	1	0.1%
47	Qatar	1	0.1%
48	Czech Republic	1	0.1%
49	Bangladesh	1	0.1%
50	Belgium	1	0.1%
51	Bulgaria	1	0.1%