Rank	Countries/Territories	Count	Percent
1	United States	309	40.7%
2	China	165	21.7%
3	Germany	60	7.9%
4	Japan	29	3.8%
5	Russia	27	3.6%
6	France	23	3%
7	Australia	18	2.4%
8	Greece	17	2.2%
9	Netherlands	16	2.1%
10	Iran, Islamic Republic of	14	1.8%
11	Singapore	9	1.2%
12	New Zealand	8	1.1%
13	Cyprus	8	1.1%
14	Sweden	7	0.9%
15	Italy	7	0.9%
16	United Kingdom	7	0.9%
17	Ireland	5	0.7%
18	India	5	0.7%
19	Canada	4	0.5%
20	Korea, Republic of	3	0.4%
21	Viet Nam	2	0.3%
22	Argentina	2	0.3%
23	Bangladesh	2	0.3%
24	Brazil	2	0.3%
25	Czech Republic	2	0.3%
26	Hungary	1	0.1%
27	Poland	1	0.1%
28	Romania	1	0.1%
29	Malaysia	1	0.1%
30	Serbia	1	0.1%
31	Switzerland	1	0.1%
32	Turkey	1	0.1%
33	Ukraine	1	0.1%