Rank	Countries/Territories	Count	Percent
1	United States	246	30.6%
2	China	209	26%
3	Germany	74	9.2%
4	Bulgaria	58	7.2%
5	Netherlands	23	2.9%
6	South Africa	20	2.5%
7	France	19	2.4%
8	Japan	19	2.4%
9	Korea, Republic of	11	1.4%
10	Australia	11	1.4%
11	Singapore	11	1.4%
12	Burkina Faso	9	1.1%
13	United Kingdom	7	0.9%
14	Switzerland	6	0.7%
15	Poland	5	0.6%
16	India	4	0.5%
17	Mongolia	4	0.5%
18	Sweden	4	0.5%
19	Ireland	4	0.5%
20	Russia	4	0.5%
21	Cyprus	4	0.5%
22	Ethiopia	4	0.5%
23	Ghana	4	0.5%
24	Hong Kong	3	0.4%
25	Latvia	3	0.4%
26	Dominican Republic	3	0.4%
27	Argentina	3	0.4%
28	Benin	3	0.4%
29	Pakistan	3	0.4%
30	Philippines	3	0.4%
31	Ukraine	3	0.4%
32	Thailand	3	0.4%
33	Viet Nam	2	0.2%
34	Taiwan	2	0.2%
35	Bangladesh	2	0.2%
36	Mauritius	2	0.2%
37	Mexico	2	0.2%
38	Canada	1	0.1%
39	Spain	1	0.1%
40	Sri Lanka	1	0.1%
41	Romania	1	0.1%
42	Morocco	1	0.1%
43	Iraq	1	0.1%
44	Turkey	1	0.1%