Rank	Countries/Territories	Count	Percent
1	United States	423	35.2%
2	China	422	35.1%
3	Bulgaria	103	8.6%
4	Germany	79	6.6%
5	Singapore	18	1.5%
6	France	13	1.1%
7	India	10	0.8%
8	Russia	10	0.8%
9	Iran, Islamic Republic of	9	0.7%
10	Ireland	9	0.7%
11	Argentina	9	0.7%
12	Australia	9	0.7%
13	Cyprus	8	0.7%
14	Canada	7	0.6%
15	Japan	7	0.6%
16	Portugal	6	0.5%
17	Spain	6	0.5%
18	Taiwan	5	0.4%
19	Netherlands	5	0.4%
20	Greece	5	0.4%
21	Finland	5	0.4%
22	Indonesia	4	0.3%
23	Mongolia	3	0.2%
24	Brazil	3	0.2%
25	Hong Kong	2	0.2%
26	Bangladesh	2	0.2%
27	Morocco	2	0.2%
28	North Macedonia	2	0.2%
29	Malaysia	2	0.2%
30	Romania	2	0.2%
31	Ukraine	2	0.2%
32	United Kingdom	1	0.1%
33	Saudi Arabia	1	0.1%
34	Tanzania, United Republic of	1	0.1%
35	Turkey	1	0.1%
36	Switzerland	1	0.1%
37	Philippines	1	0.1%
38	Denmark	1	0.1%
39	Colombia	1	0.1%
40	Latvia	1	0.1%