Rank	Countries/Territories	Count	Percent
1	United States	535	42.1%
2	China	407	32%
3	Germany	132	10.4%
4	Canada	24	1.9%
5	France	22	1.7%
6	Japan	19	1.5%
7	India	14	1.1%
8	Singapore	10	0.8%
9	Switzerland	9	0.7%
10	Netherlands	8	0.6%
11	Cyprus	8	0.6%
12	United Kingdom	8	0.6%
13	Argentina	6	0.5%
14	Iran, Islamic Republic of	6	0.5%
15	Taiwan	6	0.5%
16	Thailand	5	0.4%
17	Australia	5	0.4%
18	Bangladesh	4	0.3%
19	Ireland	4	0.3%
20	Hong Kong	4	0.3%
21	Indonesia	4	0.3%
22	Serbia	4	0.3%
23	Ukraine	3	0.2%
24	Mongolia	3	0.2%
25	Saudi Arabia	2	0.2%
26	Sweden	2	0.2%
27	Syrian Arab Republic	2	0.2%
28	Korea, Republic of	2	0.2%
29	Greece	2	0.2%
30	Israel	2	0.2%
31	Belgium	2	0.2%
32	Albania	1	0.1%
33	Italy	1	0.1%
34	Latvia	1	0.1%
35	Malaysia	1	0.1%
36	Mauritius	1	0.1%
37	Pakistan	1	0.1%
38	Poland	1	0.1%
39	Turkey	1	0.1%