Rank	Countries/Territories	Count	Percent
1	United States	571	46.4%
2	China	249	20.2%
3	Germany	137	11.1%
4	Netherlands	41	3.3%
5	Korea, Republic of	34	2.8%
6	France	29	2.4%
7	Japan	24	2%
8	Latvia	14	1.1%
9	Nigeria	13	1.1%
10	Bulgaria	12	1%
11	United Kingdom	11	0.9%
12	Ukraine	10	0.8%
13	Singapore	10	0.8%
14	Viet Nam	6	0.5%
15	South Africa	5	0.4%
16	Philippines	5	0.4%
17	Australia	5	0.4%
18	Hong Kong	5	0.4%
19	India	5	0.4%
20	Iran, Islamic Republic of	4	0.3%
21	Mongolia	4	0.3%
22	Cyprus	4	0.3%
23	Sweden	4	0.3%
24	Switzerland	3	0.2%
25	Russia	3	0.2%
26	Canada	3	0.2%
27	Ireland	3	0.2%
28	Israel	3	0.2%
29	Italy	2	0.2%
30	Egypt	2	0.2%
31	Taiwan	2	0.2%
32	Spain	2	0.2%
33	Portugal	1	0.1%
34	Peru	1	0.1%
35	Cote D'ivoire	1	0.1%
36	Bangladesh	1	0.1%
37	Bolivia, Plurinational State of	1	0.1%