Rank	Countries/Territories	Count	Percent
1	United States	199	29.3%
2	China	184	27.1%
3	Japan	47	6.9%
4	Bulgaria	36	5.3%
5		28	4.1%
6	Korea, Republic of	24	3.5%
7	Singapore	13	1.9%
8	Ireland	12	1.8%
9	Australia	12	1.8%
10	Germany	12	1.8%
11	India	12	1.8%
12	Guam	11	1.6%
13	United Kingdom	11	1.6%
14	Nigeria	10	1.5%
15	Canada	7	1%
16	Netherlands	7	1%
17	Spain	4	0.6%
18	Viet Nam	4	0.6%
19	Indonesia	4	0.6%
20	Philippines	4	0.6%
21	Romania	4	0.6%
22	Italy	4	0.6%
23	France	3	0.4%
24	Mexico	3	0.4%
25	Greece	3	0.4%
26	Bangladesh	3	0.4%
27	Brazil	2	0.3%
28	Egypt	2	0.3%
29	Hong Kong	2	0.3%
30	Iran, Islamic Republic of	1	0.1%
31	Iraq	1	0.1%
32	Argentina	1	0.1%
33	Morocco	1	0.1%
34	Nepal	1	0.1%
35	North Macedonia	1	0.1%
36	South Africa	1	0.1%
37	Israel	1	0.1%
38	Lebanon	1	0.1%
39	Lithuania	1	0.1%
40	Malaysia	1	0.1%
41	Thailand	1	0.1%
42	Ukraine	1	0.1%