Rank	Countries/Territories	Count	Percent
1	United States	523	39.6%
2	China	356	26.9%
3	Germany	157	11.9%
4	Japan	89	6.7%
5	France	42	3.2%
6	Canada	24	1.8%
7	Singapore	17	1.3%
8	Netherlands	14	1.1%
9	Switzerland	12	0.9%
10	United Kingdom	9	0.7%
11	Russia	6	0.5%
12	Korea, Republic of	6	0.5%
13	Norway	6	0.5%
14	Cyprus	6	0.5%
15	Australia	6	0.5%
16	Brazil	4	0.3%
17	Mongolia	4	0.3%
18	Romania	4	0.3%
19	South Africa	4	0.3%
20	Lithuania	3	0.2%
21	Thailand	3	0.2%
22	Argentina	3	0.2%
23	Bangladesh	3	0.2%
24	Egypt	2	0.2%
25	Philippines	2	0.2%
26	Poland	2	0.2%
27	India	2	0.2%
28	Iran, Islamic Republic of	2	0.2%
29	Iraq	2	0.2%
30	Turkey	2	0.2%
31	Taiwan	2	0.2%
32	Spain	1	0.1%
33	Ukraine	1	0.1%
34	United Arab Emirates	1	0.1%
35	Hong Kong	1	0.1%