Rank	Countries/Territories	Count	Percent
1	United States	605	54.2%
2	China	249	22.3%
3	Germany	63	5.6%
4	India	25	2.2%
5	Russia	24	2.2%
6	Spain	17	1.5%
7	Japan	14	1.3%
8	France	12	1.1%
9	Latvia	12	1.1%
10	Netherlands	9	0.8%
11	Brazil	9	0.8%
12	Hong Kong	8	0.7%
13	Canada	7	0.6%
14	Norway	6	0.5%
15	Turkey	6	0.5%
16	United Kingdom	6	0.5%
17	Iran, Islamic Republic of	5	0.4%
18	Bulgaria	3	0.3%
19	Belgium	3	0.3%
20	Cuba	3	0.3%
21	Taiwan	3	0.3%
22	Serbia	3	0.3%
23	Mexico	3	0.3%
24	Jamaica	2	0.2%
25	Luxembourg	2	0.2%
26	Pakistan	2	0.2%
27	Cyprus	2	0.2%
28	Ecuador	2	0.2%
29	Korea, Republic of	2	0.2%
30	Viet Nam	2	0.2%
31	Italy	1	0.1%
32	Estonia	1	0.1%
33	Bangladesh	1	0.1%
34	Portugal	1	0.1%
35	Romania	1	0.1%
36	Seychelles	1	0.1%
37	Singapore	1	0.1%