Rank	Countries/Territories	Count	Percent
1	United States	509	39%
2	China	360	27.6%
3	Japan	119	9.1%
4	Germany	65	5%
5	Singapore	36	2.8%
6	Canada	35	2.7%
7	France	32	2.5%
8	Bulgaria	29	2.2%
9	Netherlands	18	1.4%
10	Bangladesh	10	0.8%
11	Korea, Republic of	9	0.7%
12	Russia	6	0.5%
13	Argentina	6	0.5%
14	Australia	5	0.4%
15	Cyprus	5	0.4%
16	India	5	0.4%
17	Taiwan	5	0.4%
18	United Kingdom	5	0.4%
19	Ukraine	4	0.3%
20	Moldova, Republic of	4	0.3%
21	Thailand	3	0.2%
22	South Africa	3	0.2%
23	Spain	3	0.2%
24	Czech Republic	3	0.2%
25	Egypt	3	0.2%
26	Brazil	3	0.2%
27	Colombia	3	0.2%
28	Greece	2	0.2%
29	Iraq	2	0.2%
30	Italy	2	0.2%
31	Sweden	2	0.2%
32	Latvia	2	0.2%
33	Portugal	2	0.2%
34	Nigeria	2	0.2%
35	Poland	1	0.1%
36	Slovakia	1	0.1%
37	Iran, Islamic Republic of	1	0.1%