Rank	Countries/Territories	Count	Percent
1	United States	178	27.9%
2	China	165	25.9%
3	Germany	77	12.1%
4	Brazil	40	6.3%
5	United Kingdom	22	3.4%
6	Russia	16	2.5%
7	Serbia	16	2.5%
8	Singapore	15	2.4%
9	Japan	14	2.2%
10	India	9	1.4%
11	Korea, Republic of	8	1.3%
12	France	6	0.9%
13	Taiwan	6	0.9%
14	Netherlands	6	0.9%
15	Portugal	5	0.8%
16	Romania	5	0.8%
17	Iran, Islamic Republic of	4	0.6%
18	Ireland	4	0.6%
19	Viet Nam	4	0.6%
20	Switzerland	3	0.5%
21	Denmark	3	0.5%
22	Australia	3	0.5%
23	Bangladesh	3	0.5%
24	Hong Kong	3	0.5%
25	Oman	2	0.3%
26	Pakistan	2	0.3%
27	Thailand	2	0.3%
28	Turkey	2	0.3%
29	Spain	2	0.3%
30	Sweden	2	0.3%
31	Canada	2	0.3%
32	Venezuela, Bolivarian Republic of	2	0.3%
33	Argentina	1	0.2%
34	Israel	1	0.2%
35	Lebanon	1	0.2%
36	Malaysia	1	0.2%
37	South Africa	1	0.2%
38	Peru	1	0.2%
39	New Zealand	1	0.2%