Rank	Countries/Territories	Count	Percent
1	United States	600	46.9%
2	China	318	24.9%
3	Germany	96	7.5%
4	Bulgaria	53	4.1%
5	Netherlands	32	2.5%
6	United Kingdom	27	2.1%
7	Japan	17	1.3%
8	Denmark	17	1.3%
9	Singapore	16	1.3%
10	Korea, Republic of	14	1.1%
11	Nigeria	8	0.6%
12	Australia	8	0.6%
13	Iran, Islamic Republic of	6	0.5%
14	Ukraine	6	0.5%
15	South Africa	5	0.4%
16	Canada	5	0.4%
17	Brazil	5	0.4%
18	France	5	0.4%
19	India	5	0.4%
20	Cyprus	4	0.3%
21	Hong Kong	3	0.2%
22	Spain	3	0.2%
23	Russia	3	0.2%
24	Ireland	3	0.2%
25	New Zealand	3	0.2%
26	Thailand	2	0.2%
27	Norway	2	0.2%
28	Egypt	2	0.2%
29	Belgium	2	0.2%
30	Argentina	1	0.1%
31	Bangladesh	1	0.1%
32	Croatia	1	0.1%
33	Romania	1	0.1%
34	Sweden	1	0.1%
35	Malaysia	1	0.1%
36	Israel	1	0.1%
37	Iraq	1	0.1%