Rank	Countries/Territories	Count	Percent
1	United States	312	38.6%
2	China	295	36.5%
3	Germany	77	9.5%
4	India	12	1.5%
5	Japan	12	1.5%
6	Canada	11	1.4%
7	Iran, Islamic Republic of	9	1.1%
8	Australia	6	0.7%
9	Singapore	6	0.7%
10	Netherlands	5	0.6%
11	Uzbekistan	5	0.6%
12	Spain	5	0.6%
13	Taiwan	5	0.6%
14	Belgium	5	0.6%
15	Slovenia	4	0.5%
16	Turkey	3	0.4%
17	United Kingdom	3	0.4%
18	Israel	3	0.4%
19	Italy	2	0.2%
20	Ireland	2	0.2%
21	Argentina	2	0.2%
22	Cyprus	2	0.2%
23	Denmark	2	0.2%
24	Egypt	2	0.2%
25	Finland	2	0.2%
26	Viet Nam	2	0.2%
27	Thailand	2	0.2%
28	Malaysia	2	0.2%
29	Palestine, State of	2	0.2%
30	Portugal	2	0.2%
31	Romania	1	0.1%
32	Senegal	1	0.1%
33	Switzerland	1	0.1%
34	France	1	0.1%
35	Belarus	1	0.1%
36	Indonesia	1	0.1%
37	Colombia	1	0.1%