Rank	Countries/Territories	Count	Percent
1	United States	317	39.4%
2	China	239	29.7%
3	Germany	58	7.2%
4	Canada	22	2.7%
5	Japan	19	2.4%
6	Russia	18	2.2%
7	France	16	2%
8	Turkey	15	1.9%
9	Norway	9	1.1%
10	Netherlands	8	1%
11	Italy	8	1%
12	Ghana	7	0.9%
13	Belgium	5	0.6%
14	Singapore	5	0.6%
15	Syrian Arab Republic	4	0.5%
16	Brazil	4	0.5%
17	Argentina	4	0.5%
18	Australia	4	0.5%
19	India	4	0.5%
20	Hong Kong	3	0.4%
21	Saudi Arabia	3	0.4%
22	United Kingdom	3	0.4%
23	Viet Nam	2	0.2%
24	Poland	2	0.2%
25	Portugal	2	0.2%
26	Taiwan	2	0.2%
27	Malaysia	2	0.2%
28	Ireland	2	0.2%
29	Iceland	2	0.2%
30	Greece	2	0.2%
31	Chile	2	0.2%
32	Colombia	2	0.2%
33	Cyprus	2	0.2%
34	Egypt	1	0.1%
35	Iran, Islamic Republic of	1	0.1%
36	Lithuania	1	0.1%
37	Mauritius	1	0.1%
38	New Zealand	1	0.1%
39	Spain	1	0.1%
40	Ukraine	1	0.1%