Rank	Countries/Territories	Count	Percent
1	United States	309	29%
2	China	242	22.7%
3	India	181	17%
4	Germany	35	3.3%
5	Brazil	32	3%
6	Japan	27	2.5%
7	Russia	20	1.9%
8	United Kingdom	20	1.9%
9	Zambia	19	1.8%
10	Netherlands	16	1.5%
11	Australia	16	1.5%
12	Korea, Republic of	14	1.3%
13	Pakistan	13	1.2%
14	Canada	12	1.1%
15	Iran, Islamic Republic of	12	1.1%
16	Colombia	9	0.8%
17	Italy	9	0.8%
18	South Africa	7	0.7%
19	Switzerland	7	0.7%
20	Turkey	6	0.6%
21	Ireland	6	0.6%
22	Israel	6	0.6%
23	Ethiopia	5	0.5%
24	Romania	5	0.5%
25	Portugal	4	0.4%
26	France	3	0.3%
27	Singapore	3	0.3%
28	Taiwan	2	0.2%
29	Thailand	2	0.2%
30	Denmark	2	0.2%
31	Peru	2	0.2%
32	Argentina	2	0.2%
33	Mexico	2	0.2%
34	Morocco	1	0.1%
35	Lithuania	1	0.1%
36	Malaysia	1	0.1%
37	Philippines	1	0.1%
38	Norway	1	0.1%
39	Oman	1	0.1%
40	Qatar	1	0.1%
41	Rwanda	1	0.1%
42	Egypt	1	0.1%
43	Czech Republic	1	0.1%
44	Bangladesh	1	0.1%
45	Belgium	1	0.1%
46	Guatemala	1	0.1%
47	Hong Kong	1	0.1%
48	Ukraine	1	0.1%
49	Sweden	1	0.1%