Rank	Countries/Territories	Count	Percent
1	United States	529	40.5%
2	China	446	34.2%
3	Germany	85	6.5%
4	Japan	50	3.8%
5	United Kingdom	22	1.7%
6	France	18	1.4%
7	Netherlands	17	1.3%
8	Singapore	14	1.1%
9	Canada	12	0.9%
10	Bulgaria	11	0.8%
11	Italy	10	0.8%
12	Korea, Republic of	9	0.7%
13	Nigeria	9	0.7%
14	Spain	9	0.7%
15	Cyprus	7	0.5%
16	Australia	5	0.4%
17	Iran, Islamic Republic of	5	0.4%
18	Ukraine	5	0.4%
19	Russia	5	0.4%
20	Sweden	4	0.3%
21	Switzerland	4	0.3%
22	South Africa	4	0.3%
23	Malaysia	3	0.2%
24	Philippines	3	0.2%
25	Viet Nam	3	0.2%
26	Greece	3	0.2%
27	Hong Kong	2	0.2%
28	Ireland	2	0.2%
29	Brazil	2	0.2%
30	United Arab Emirates	2	0.2%
31	Poland	1	0.1%
32	Argentina	1	0.1%
33	Bangladesh	1	0.1%
34	Bolivia, Plurinational State of	1	0.1%
35	India	1	0.1%