Rank	Countries/Territories	Count	Percent
1	United States	309	40.9%
2	China	188	24.9%
3	Germany	71	9.4%
4	France	23	3%
5		17	2.3%
6	Japan	14	1.9%
7	Russia	13	1.7%
8	India	13	1.7%
9	Spain	12	1.6%
10	Mongolia	11	1.5%
11	Netherlands	11	1.5%
12	Brazil	11	1.5%
13	Italy	8	1.1%
14	Singapore	6	0.8%
15	Australia	6	0.8%
16	Egypt	5	0.7%
17	Hong Kong	5	0.7%
18	Canada	4	0.5%
19	Switzerland	4	0.5%
20	United Kingdom	3	0.4%
21	Iran, Islamic Republic of	3	0.4%
22	Ireland	2	0.3%
23	Peru	2	0.3%
24	Cyprus	2	0.3%
25	Thailand	2	0.3%
26	Turkey	2	0.3%
27	Ukraine	2	0.3%
28	Romania	2	0.3%
29	Korea, Republic of	1	0.1%
30	Taiwan	1	0.1%
31	Denmark	1	0.1%
32	Poland	1	0.1%