Rank	Countries/Territories	Count	Percent
1	United States	321	40.2%
2	China	169	21.2%
3	Germany	73	9.1%
4	Japan	30	3.8%
5	Russia	27	3.4%
6	France	26	3.3%
7	Australia	18	2.3%
8	Greece	17	2.1%
9	Netherlands	17	2.1%
10	Iran, Islamic Republic of	14	1.8%
11	Singapore	9	1.1%
12	New Zealand	8	1%
13	Cyprus	8	1%
14	Italy	7	0.9%
15	United Kingdom	7	0.9%
16	Sweden	7	0.9%
17	India	5	0.6%
18	Ireland	5	0.6%
19	Canada	4	0.5%
20	Korea, Republic of	3	0.4%
21	South Africa	3	0.4%
22	Viet Nam	2	0.3%
23	Chile	2	0.3%
24	Bangladesh	2	0.3%
25	Brazil	2	0.3%
26	Czech Republic	2	0.3%
27	Argentina	2	0.3%
28	Malaysia	1	0.1%
29	Hungary	1	0.1%
30	Switzerland	1	0.1%
31	Turkey	1	0.1%
32	Ukraine	1	0.1%
33	Serbia	1	0.1%
34	Poland	1	0.1%
35	Romania	1	0.1%