Rank	Countries/Territories	Count	Percent
1	United States	452	44.1%
2	China	221	21.6%
3	Germany	109	10.6%
4	Canada	46	4.5%
5	Russia	32	3.1%
6	Japan	16	1.6%
7	France	16	1.6%
8	Belgium	13	1.3%
9	Australia	12	1.2%
10	Cyprus	11	1.1%
11	Netherlands	11	1.1%
12	Iran, Islamic Republic of	10	1%
13	United Kingdom	8	0.8%
14	Korea, Republic of	7	0.7%
15	Singapore	7	0.7%
16	India	5	0.5%
17	Viet Nam	5	0.5%
18	Norway	4	0.4%
19	Taiwan	4	0.4%
20	Ireland	4	0.4%
21	Israel	3	0.3%
22	Argentina	3	0.3%
23	Latvia	3	0.3%
24	Mongolia	2	0.2%
25	Thailand	2	0.2%
26	Turkey	2	0.2%
27	Denmark	2	0.2%
28	Portugal	2	0.2%
29	Romania	2	0.2%
30	Greece	1	0.1%
31	Italy	1	0.1%
32	Brazil	1	0.1%
33	Bahrain	1	0.1%
34		1	0.1%
35	Algeria	1	0.1%
36	Ukraine	1	0.1%
37	Slovakia	1	0.1%
38	Spain	1	0.1%
39	Poland	1	0.1%