Rank	Countries/Territories	Count	Percent
1	United States	334	37.7%
2	China	276	31.2%
3	Germany	70	7.9%
4	Japan	25	2.8%
5	Canada	22	2.5%
6	France	19	2.1%
7	Russia	18	2%
8	Turkey	15	1.7%
9	Singapore	11	1.2%
10	Norway	9	1%
11	Netherlands	9	1%
12	Italy	8	0.9%
13	Ghana	7	0.8%
14	Belgium	5	0.6%
15	Brazil	4	0.5%
16	Argentina	4	0.5%
17	Australia	4	0.5%
18	India	4	0.5%
19	Syrian Arab Republic	4	0.5%
20	Saudi Arabia	3	0.3%
21	Hong Kong	3	0.3%
22	United Kingdom	3	0.3%
23	Viet Nam	2	0.2%
24	Iceland	2	0.2%
25	Greece	2	0.2%
26	Chile	2	0.2%
27	Colombia	2	0.2%
28	Cyprus	2	0.2%
29	Poland	2	0.2%
30	Portugal	2	0.2%
31	Taiwan	2	0.2%
32	Malaysia	2	0.2%
33	Ireland	2	0.2%
34	Lithuania	1	0.1%
35	Mauritius	1	0.1%
36	New Zealand	1	0.1%
37	Spain	1	0.1%
38	Egypt	1	0.1%
39	Iran, Islamic Republic of	1	0.1%
40	Ukraine	1	0.1%