Rank	Countries/Territories	Count	Percent
1	United States	251	34%
2	China	195	26.4%
3	Germany	55	7.5%
4		40	5.4%
5	Bulgaria	24	3.3%
6	Canada	24	3.3%
7	Japan	21	2.8%
8	Singapore	14	1.9%
9	France	14	1.9%
10	Netherlands	12	1.6%
11	India	11	1.5%
12	United Kingdom	11	1.5%
13	Korea, Republic of	9	1.2%
14	Thailand	6	0.8%
15	Cyprus	6	0.8%
16	Italy	4	0.5%
17	Zambia	3	0.4%
18	Estonia	3	0.4%
19	Australia	3	0.4%
20	Turkey	3	0.4%
21	Philippines	3	0.4%
22	Iran, Islamic Republic of	2	0.3%
23	Argentina	2	0.3%
24	Ecuador	2	0.3%
25	Greece	2	0.3%
26	Hungary	2	0.3%
27	Iceland	1	0.1%
28	Bangladesh	1	0.1%
29	Brazil	1	0.1%
30	Chile	1	0.1%
31	Cote D'ivoire	1	0.1%
32	Iraq	1	0.1%
33	Ireland	1	0.1%
34	Lithuania	1	0.1%
35	Morocco	1	0.1%
36	Jordan	1	0.1%
37	Portugal	1	0.1%
38	Romania	1	0.1%
39	Pakistan	1	0.1%
40	Ukraine	1	0.1%
41	South Africa	1	0.1%
42	Viet Nam	1	0.1%