Rank	Countries/Territories	Count	Percent
1	United States	348	33.6%
2	China	266	25.7%
3	Germany	167	16.1%
4	Netherlands	39	3.8%
5	Bulgaria	34	3.3%
6	Australia	24	2.3%
7	France	23	2.2%
8	Japan	14	1.4%
9	Singapore	12	1.2%
10	Ukraine	12	1.2%
11	Canada	8	0.8%
12	India	7	0.7%
13	Russia	6	0.6%
14	Korea, Republic of	6	0.6%
15	United Kingdom	6	0.6%
16	Bangladesh	5	0.5%
17	South Africa	5	0.5%
18	Thailand	5	0.5%
19	Philippines	5	0.5%
20	Pakistan	4	0.4%
21	Iran, Islamic Republic of	4	0.4%
22	Cyprus	4	0.4%
23	Latvia	4	0.4%
24	Taiwan	4	0.4%
25	Malaysia	3	0.3%
26	Turkey	3	0.3%
27	Switzerland	3	0.3%
28	Morocco	2	0.2%
29	Libya	2	0.2%
30	Georgia	2	0.2%
31	Hong Kong	2	0.2%
32	Costa Rica	2	0.2%
33	Argentina	1	0.1%
34	Spain	1	0.1%
35	Senegal	1	0.1%
36	Mauritius	1	0.1%
37	Poland	1	0.1%
38	Romania	1	0.1%