Rank	Countries/Territories	Count	Percent
1	United States	376	36.3%
2	China	307	29.6%
3	Germany	60	5.8%
4	Bulgaria	36	3.5%
5	India	35	3.4%
6	Japan	23	2.2%
7	France	19	1.8%
8	Canada	18	1.7%
9	Russia	15	1.4%
10	Iran, Islamic Republic of	11	1.1%
11	Netherlands	11	1.1%
12	Sweden	9	0.9%
13	Singapore	9	0.9%
14	United Kingdom	8	0.8%
15	Korea, Republic of	8	0.8%
16	Australia	7	0.7%
17	Taiwan	7	0.7%
18	Argentina	6	0.6%
19	Denmark	6	0.6%
20	Hong Kong	6	0.6%
21	Italy	5	0.5%
22	Greece	4	0.4%
23	Belgium	4	0.4%
24	Thailand	4	0.4%
25	Turkey	4	0.4%
26	Romania	3	0.3%
27	Brazil	3	0.3%
28	Cyprus	3	0.3%
29	Egypt	3	0.3%
30	Nigeria	3	0.3%
31	Iraq	3	0.3%
32	Peru	2	0.2%
33	Israel	2	0.2%
34	New Zealand	2	0.2%
35	Poland	2	0.2%
36	South Africa	2	0.2%
37	Spain	1	0.1%
38	Saudi Arabia	1	0.1%
39	Philippines	1	0.1%
40	Pakistan	1	0.1%
41	Ireland	1	0.1%
42	Malaysia	1	0.1%
43	Mexico	1	0.1%
44	Finland	1	0.1%
45	Hungary	1	0.1%
46	Czech Republic	1	0.1%
47	Bangladesh	1	0.1%