Rank	Countries/Territories	Count	Percent
1	United States	381	31.9%
2	China	264	22.1%
3	India	182	15.2%
4	Germany	37	3.1%
5	Brazil	32	2.7%
6	Japan	29	2.4%
7	United Kingdom	23	1.9%
8	Russia	22	1.8%
9	Australia	22	1.8%
10	Zambia	19	1.6%
11	Netherlands	17	1.4%
12	Korea, Republic of	16	1.3%
13	Pakistan	14	1.2%
14	Iran, Islamic Republic of	14	1.2%
15	Canada	13	1.1%
16	Italy	12	1%
17	Turkey	10	0.8%
18	Colombia	9	0.8%
19	Portugal	7	0.6%
20	Switzerland	7	0.6%
21	South Africa	7	0.6%
22	Ireland	6	0.5%
23	Israel	6	0.5%
24	Ethiopia	5	0.4%
25	Romania	5	0.4%
26	Singapore	5	0.4%
27	France	3	0.3%
28	Denmark	2	0.2%
29	Argentina	2	0.2%
30	Peru	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	Rwanda	1	0.1%
37	Morocco	1	0.1%
38	Guatemala	1	0.1%
39	Hong Kong	1	0.1%
40	Lithuania	1	0.1%
41	Malaysia	1	0.1%
42	Philippines	1	0.1%
43	Norway	1	0.1%
44	Oman	1	0.1%
45	Qatar	1	0.1%
46	Czech Republic	1	0.1%
47	Bangladesh	1	0.1%
48	Belgium	1	0.1%
49	Bulgaria	1	0.1%
50	Egypt	1	0.1%