Rank	Countries/Territories	Count	Percent
1	United States	516	40.3%
2	China	298	23.3%
3	Germany	109	8.5%
4	Bulgaria	48	3.8%
5	Netherlands	34	2.7%
6	Hong Kong	24	1.9%
7	India	23	1.8%
8	Canada	23	1.8%
9	Singapore	22	1.7%
10	France	21	1.6%
11	Japan	19	1.5%
12	Russia	14	1.1%
13	United Kingdom	14	1.1%
14	Thailand	12	0.9%
15	Nigeria	10	0.8%
16	South Africa	9	0.7%
17	Australia	8	0.6%
18	Viet Nam	8	0.6%
19	Turkey	7	0.5%
20	Portugal	6	0.5%
21	Sweden	5	0.4%
22	Latvia	5	0.4%
23	Korea, Republic of	4	0.3%
24	Ireland	4	0.3%
25	Italy	4	0.3%
26	Hungary	3	0.2%
27	Bangladesh	3	0.2%
28	Cyprus	3	0.2%
29	Spain	3	0.2%
30	Romania	2	0.2%
31	Iran, Islamic Republic of	2	0.2%
32	Poland	2	0.2%
33	Mexico	2	0.2%
34	Bolivia, Plurinational State of	2	0.2%
35	Ukraine	2	0.2%
36	Togo	2	0.2%
37	Argentina	1	0.1%
38	Indonesia	1	0.1%
39	Mongolia	1	0.1%
40	Malaysia	1	0.1%
41	Mauritius	1	0.1%
42	Peru	1	0.1%
43	Philippines	1	0.1%