Rank	Countries/Territories	Count	Percent
1	United States	364	43.7%
2	China	153	18.4%
3	Germany	66	7.9%
4	Japan	42	5%
5	United Kingdom	28	3.4%
6	Romania	25	3%
7	Russia	22	2.6%
8	Netherlands	11	1.3%
9	Switzerland	11	1.3%
10	Canada	11	1.3%
11	Australia	10	1.2%
12	France	9	1.1%
13	Sweden	9	1.1%
14	Singapore	9	1.1%
15	Korea, Republic of	7	0.8%
16	Iran, Islamic Republic of	7	0.8%
17	Spain	6	0.7%
18	Turkey	4	0.5%
19	Italy	4	0.5%
20	India	4	0.5%
21	Cyprus	4	0.5%
22	Taiwan	3	0.4%
23	United Arab Emirates	2	0.2%
24	Portugal	2	0.2%
25	New Zealand	2	0.2%
26	South Africa	2	0.2%
27	Denmark	2	0.2%
28	Finland	2	0.2%
29	Hong Kong	2	0.2%
30	Iraq	2	0.2%
31	Ireland	1	0.1%
32	Costa Rica	1	0.1%
33	Cuba	1	0.1%
34	Brazil	1	0.1%
35	Argentina	1	0.1%
36	Poland	1	0.1%
37	Ukraine	1	0.1%
38	Viet Nam	1	0.1%