Rank	Countries/Territories	Count	Percent
1	United States	441	51.9%
2	China	175	20.6%
3	Germany	59	6.9%
4	Bulgaria	32	3.8%
5	Netherlands	18	2.1%
6	France	14	1.6%
7	Hong Kong	11	1.3%
8	Taiwan	10	1.2%
9	United Kingdom	9	1.1%
10	Korea, Republic of	9	1.1%
11	Japan	8	0.9%
12	Singapore	8	0.9%
13	Canada	6	0.7%
14	Australia	4	0.5%
15	Latvia	4	0.5%
16	Argentina	3	0.4%
17	Hungary	3	0.4%
18	Cyprus	3	0.4%
19	Mauritius	3	0.4%
20	Spain	3	0.4%
21	Philippines	3	0.4%
22	Portugal	3	0.4%
23	Russia	3	0.4%
24	Thailand	3	0.4%
25	Turkey	2	0.2%
26	Norway	2	0.2%
27	India	2	0.2%
28	Iran, Islamic Republic of	2	0.2%
29	Malaysia	1	0.1%
30	Ethiopia	1	0.1%
31	Georgia	1	0.1%
32	Bangladesh	1	0.1%
33	South Africa	1	0.1%
34	Ukraine	1	0.1%