Rank	Countries/Territories	Count	Percent
1	United States	470	40.4%
2	China	301	25.9%
3	Russia	109	9.4%
4	Germany	51	4.4%
5	India	33	2.8%
6	Brazil	21	1.8%
7	Italy	20	1.7%
8	United Kingdom	14	1.2%
9	Korea, Republic of	13	1.1%
10	Portugal	12	1%
11	Japan	11	0.9%
12	France	11	0.9%
13	Greece	11	0.9%
14	Australia	9	0.8%
15	Mexico	8	0.7%
16	Canada	7	0.6%
17	Hong Kong	6	0.5%
18	Spain	6	0.5%
19	Netherlands	5	0.4%
20	Ireland	4	0.3%
21	Argentina	4	0.3%
22	Viet Nam	4	0.3%
23	Turkey	3	0.3%
24	Singapore	3	0.3%
25	South Africa	2	0.2%
26	Romania	2	0.2%
27	Switzerland	2	0.2%
28	Taiwan	2	0.2%
29	Mongolia	2	0.2%
30	Finland	2	0.2%
31	Bangladesh	2	0.2%
32	Iceland	2	0.2%
33	Ukraine	2	0.2%
34	Malta	2	0.2%
35	Iran, Islamic Republic of	1	0.1%
36	Czech Republic	1	0.1%
37	Egypt	1	0.1%
38	Nepal	1	0.1%
39	New Zealand	1	0.1%
40	Lithuania	1	0.1%
41	Malaysia	1	0.1%
42	Sweden	1	0.1%