Rank	Countries/Territories	Count	Percent
1	United States	317	38.2%
2	China	240	28.9%
3	Germany	104	12.5%
4	Iran, Islamic Republic of	39	4.7%
5	France	21	2.5%
6	Japan	18	2.2%
7	Ukraine	18	2.2%
8	Cyprus	12	1.4%
9	Canada	12	1.4%
10	India	10	1.2%
11	Netherlands	7	0.8%
12	Korea, Republic of	6	0.7%
13	Singapore	5	0.6%
14	Latvia	4	0.5%
15	Ireland	4	0.5%
16	Mongolia	3	0.4%
17	Hong Kong	2	0.2%
18	Bangladesh	2	0.2%
19		2	0.2%
20	Australia	1	0.1%
21	Georgia	1	0.1%
22	Romania	1	0.1%
23	Russia	1	0.1%