Rank	Countries/Territories	Count	Percent
1	United States	438	33.4%
2	China	336	25.6%
3	Germany	122	9.3%
4	Netherlands	98	7.5%
5	Japan	62	4.7%
6	Bulgaria	41	3.1%
7	Iran, Islamic Republic of	22	1.7%
8	Singapore	20	1.5%
9	France	16	1.2%
10	Canada	13	1%
11	United Kingdom	12	0.9%
12	Lithuania	12	0.9%
13	Nigeria	12	0.9%
14	Russia	9	0.7%
15	South Africa	9	0.7%
16	Spain	8	0.6%
17	Switzerland	7	0.5%
18	Korea, Republic of	7	0.5%
19	Bangladesh	6	0.5%
20	Thailand	6	0.5%
21	Portugal	6	0.5%
22	Latvia	5	0.4%
23	Hong Kong	4	0.3%
24	India	4	0.3%
25	Australia	4	0.3%
26	Cyprus	4	0.3%
27	Romania	4	0.3%
28	Turkey	4	0.3%
29	Viet Nam	4	0.3%
30	Argentina	3	0.2%
31	Brazil	2	0.2%
32	Ukraine	2	0.2%
33	Pakistan	2	0.2%
34	Morocco	2	0.2%
35	Malaysia	1	0.1%
36	Philippines	1	0.1%
37	Greece	1	0.1%
38	Belgium	1	0.1%
39	Chile	1	0.1%