Rank	Countries/Territories	Count	Percent
1	United States	284	36.9%
2	China	245	31.8%
3	Germany	54	7%
4	France	38	4.9%
5	Japan	26	3.4%
6	Ukraine	19	2.5%
7	Norway	10	1.3%
8	Korea, Republic of	10	1.3%
9	Canada	9	1.2%
10	Cyprus	8	1%
11	Singapore	7	0.9%
12	Netherlands	6	0.8%
13	Australia	6	0.8%
14	Iran, Islamic Republic of	6	0.8%
15	India	5	0.6%
16	Lithuania	4	0.5%
17	Turkey	4	0.5%
18	Romania	3	0.4%
19	United Kingdom	3	0.4%
20	Ireland	3	0.4%
21	Mexico	2	0.3%
22	Poland	2	0.3%
23	Switzerland	2	0.3%
24	Taiwan	2	0.3%
25	Iraq	2	0.3%
26	Brazil	2	0.3%
27	Ethiopia	2	0.3%
28	Hong Kong	1	0.1%
29	Chile	1	0.1%
30	Malaysia	1	0.1%
31	Viet Nam	1	0.1%
32	Slovenia	1	0.1%
33	Mongolia	1	0.1%