Rank	Countries/Territories	Count	Percent
1	United States	583	36.1%
2	China	471	29.2%
3	Germany	108	6.7%
4	Russia	58	3.6%
5	Japan	53	3.3%
6	Bulgaria	52	3.2%
7	Latvia	38	2.4%
8	Netherlands	30	1.9%
9	Spain	27	1.7%
10	France	25	1.5%
11	Canada	18	1.1%
12	Switzerland	18	1.1%
13	Singapore	17	1.1%
14	United Kingdom	11	0.7%
15	Turkey	10	0.6%
16	Cyprus	8	0.5%
17	Australia	7	0.4%
18	India	7	0.4%
19	South Africa	7	0.4%
20	Nigeria	6	0.4%
21	Philippines	5	0.3%
22	Lithuania	4	0.2%
23	Portugal	4	0.2%
24	Iran, Islamic Republic of	4	0.2%
25	Ireland	4	0.2%
26	Argentina	4	0.2%
27	Bangladesh	3	0.2%
28	Malaysia	3	0.2%
29	Ukraine	3	0.2%
30	Mauritius	2	0.1%
31	Poland	2	0.1%
32	Kenya	2	0.1%
33	Taiwan	2	0.1%
34	Thailand	2	0.1%
35	Belgium	2	0.1%
36	Bolivia, Plurinational State of	2	0.1%
37	Egypt	2	0.1%
38	Ghana	2	0.1%
39	Iraq	2	0.1%
40	Brazil	1	0.1%
41	Czech Republic	1	0.1%
42	Togo	1	0.1%
43	Romania	1	0.1%
44	Viet Nam	1	0.1%