Rank	Countries/Territories	Count	Percent
1	United States	387	30.3%
2	China	321	25.1%
3	Germany	267	20.9%
4	Bulgaria	40	3.1%
5	Canada	31	2.4%
6	Korea, Republic of	28	2.2%
7	Netherlands	24	1.9%
8	France	21	1.6%
9	India	16	1.3%
10	Australia	13	1%
11	Turkey	12	0.9%
12	Togo	11	0.9%
13	Japan	11	0.9%
14	Burkina Faso	8	0.6%
15	Hong Kong	7	0.5%
16	Cote D'ivoire	6	0.5%
17	Nigeria	6	0.5%
18	United Kingdom	6	0.5%
19	Latvia	5	0.4%
20	Cyprus	5	0.4%
21	Greece	5	0.4%
22	Iran, Islamic Republic of	5	0.4%
23	Singapore	4	0.3%
24	Thailand	4	0.3%
25	Ukraine	3	0.2%
26	Saudi Arabia	3	0.2%
27	Lithuania	3	0.2%
28	Ireland	3	0.2%
29	Cambodia	3	0.2%
30	Brazil	3	0.2%
31	Argentina	2	0.2%
32	Indonesia	2	0.2%
33	Mongolia	2	0.2%
34	Taiwan	2	0.2%
35	Russia	2	0.2%
36	South Africa	2	0.2%
37	Spain	2	0.2%
38	Switzerland	1	0.1%
39	North Macedonia	1	0.1%
40	Romania	1	0.1%