Rank	Countries/Territories	Count	Percent
1	United States	437	38.4%
2	China	414	36.3%
3	Germany	87	7.6%
4	Korea, Republic of	27	2.4%
5	Iran, Islamic Republic of	25	2.2%
6	Netherlands	21	1.8%
7	Mongolia	18	1.6%
8	Iraq	14	1.2%
9	Japan	14	1.2%
10	India	13	1.1%
11	Singapore	10	0.9%
12	France	9	0.8%
13	Latvia	6	0.5%
14	Australia	5	0.4%
15		4	0.4%
16	Russia	4	0.4%
17	United Kingdom	4	0.4%
18	Sweden	3	0.3%
19	Argentina	3	0.3%
20	Canada	3	0.3%
21	Cyprus	2	0.2%
22	Egypt	2	0.2%
23	Bosnia and Herzegovina	2	0.2%
24	Saudi Arabia	2	0.2%
25	Pakistan	2	0.2%
26	Romania	2	0.2%
27	Malaysia	1	0.1%
28	Switzerland	1	0.1%
29	Cameroon	1	0.1%
30	Bangladesh	1	0.1%
31	Hong Kong	1	0.1%
32	Ireland	1	0.1%