Rank	Countries/Territories	Count	Percent
1	United States	389	43.2%
2	China	215	23.9%
3	Germany	48	5.3%
4	Russia	42	4.7%
5	Japan	32	3.6%
6	Korea, Republic of	24	2.7%
7	Brazil	23	2.6%
8	India	17	1.9%
9	Hong Kong	12	1.3%
10	Malaysia	9	1%
11	Greece	8	0.9%
12	Netherlands	7	0.8%
13	Taiwan	7	0.8%
14	Senegal	7	0.8%
15	Singapore	5	0.6%
16	Latvia	5	0.6%
17	Canada	5	0.6%
18	Australia	5	0.6%
19	France	3	0.3%
20	Iran, Islamic Republic of	3	0.3%
21	Ireland	3	0.3%
22	United Kingdom	3	0.3%
23	New Zealand	3	0.3%
24	Philippines	3	0.3%
25	Romania	3	0.3%
26	Saudi Arabia	3	0.3%
27	Ukraine	2	0.2%
28	South Africa	2	0.2%
29	Spain	2	0.2%
30	Argentina	2	0.2%
31	Colombia	2	0.2%
32	Austria	2	0.2%
33	Bangladesh	1	0.1%
34	Italy	1	0.1%
35	Sweden	1	0.1%
36	Poland	1	0.1%