Rank	Countries/Territories	Count	Percent
1	United States	524	37.5%
2	China	397	28.4%
3	Germany	141	10.1%
4	Netherlands	51	3.6%
5	Canada	34	2.4%
6	United Kingdom	34	2.4%
7	India	22	1.6%
8	Japan	19	1.4%
9		18	1.3%
10	Romania	14	1%
11	Australia	13	0.9%
12	France	12	0.9%
13	Iran, Islamic Republic of	11	0.8%
14	Ireland	10	0.7%
15	Switzerland	10	0.7%
16	Taiwan	9	0.6%
17	Singapore	8	0.6%
18	Spain	6	0.4%
19	Denmark	6	0.4%
20	Ukraine	6	0.4%
21	Cyprus	5	0.4%
22	Pakistan	5	0.4%
23	Hong Kong	5	0.4%
24	Korea, Republic of	5	0.4%
25	Zambia	4	0.3%
26	Italy	3	0.2%
27	Mongolia	3	0.2%
28	Poland	3	0.2%
29	Belgium	3	0.2%
30	Brazil	2	0.1%
31	Egypt	2	0.1%
32	Greece	2	0.1%
33	Israel	2	0.1%
34	Russia	2	0.1%
35	Sweden	2	0.1%
36	Malaysia	2	0.1%
37	Norway	1	0.1%
38	Turkey	1	0.1%
39	Chile	1	0.1%