Rank	Countries/Territories	Count	Percent
1	United States	472	37.8%
2	China	339	27.1%
3	Germany	180	14.4%
4	Japan	41	3.3%
5	France	40	3.2%
6	Canada	20	1.6%
7	Korea, Republic of	15	1.2%
8	Iraq	15	1.2%
9	Ireland	15	1.2%
10	Netherlands	14	1.1%
11	Singapore	13	1%
12	Cyprus	9	0.7%
13	Australia	7	0.6%
14	Argentina	6	0.5%
15	Hong Kong	6	0.5%
16	Indonesia	6	0.5%
17	United Kingdom	6	0.5%
18	Thailand	5	0.4%
19	Spain	5	0.4%
20	Brazil	5	0.4%
21	Nigeria	4	0.3%
22	Mexico	3	0.2%
23	Mongolia	2	0.2%
24	Nepal	2	0.2%
25	South Africa	2	0.2%
26	Sri Lanka	2	0.2%
27	Ukraine	2	0.2%
28	Bangladesh	2	0.2%
29	India	2	0.2%
30	Latvia	2	0.2%
31	Malaysia	2	0.2%
32	Finland	1	0.1%
33	Colombia	1	0.1%
34	Switzerland	1	0.1%
35	Taiwan	1	0.1%
36	Israel	1	0.1%
37	Viet Nam	1	0.1%