Rank	Countries/Territories	Count	Percent
1	United States	294	35.3%
2	China	212	25.4%
3	Germany	54	6.5%
4	India	39	4.7%
5	Bulgaria	26	3.1%
6	France	17	2%
7	Japan	17	2%
8	Netherlands	15	1.8%
9	Turkey	14	1.7%
10	Romania	12	1.4%
11	Greece	9	1.1%
12	Brazil	8	1%
13	Slovakia	8	1%
14	Canada	7	0.8%
15	Cyprus	7	0.8%
16	Nigeria	6	0.7%
17	Pakistan	6	0.7%
18	Philippines	6	0.7%
19	Ukraine	6	0.7%
20	United Kingdom	5	0.6%
21	Viet Nam	5	0.6%
22	Singapore	5	0.6%
23	Ireland	5	0.6%
24	Poland	4	0.5%
25	Saudi Arabia	4	0.5%
26	Korea, Republic of	4	0.5%
27	Latvia	3	0.4%
28	Malaysia	3	0.4%
29	Nepal	3	0.4%
30	Russia	3	0.4%
31	Indonesia	3	0.4%
32	Australia	3	0.4%
33	Azerbaijan	3	0.4%
34	Algeria	2	0.2%
35	Colombia	2	0.2%
36	Hong Kong	2	0.2%
37	Panama	2	0.2%
38	Morocco	2	0.2%
39	New Zealand	1	0.1%
40	Mexico	1	0.1%
41	Palestine, State of	1	0.1%
42	Italy	1	0.1%
43	South Africa	1	0.1%
44	Switzerland	1	0.1%
45	Taiwan	1	0.1%
46	Thailand	1	0.1%