Rank	Countries/Territories	Count	Percent
1	United States	493	51.5%
2	China	227	23.7%
3	Germany	63	6.6%
4	Russia	24	2.5%
5	India	21	2.2%
6	Spain	17	1.8%
7	Japan	14	1.5%
8	Latvia	12	1.3%
9	Netherlands	9	0.9%
10	France	9	0.9%
11	Brazil	9	0.9%
12	Hong Kong	6	0.6%
13	Norway	6	0.6%
14	United Kingdom	6	0.6%
15	Iran, Islamic Republic of	5	0.5%
16	Canada	4	0.4%
17	Cuba	3	0.3%
18	Mexico	3	0.3%
19	Taiwan	3	0.3%
20	Turkey	3	0.3%
21	Serbia	3	0.3%
22	Viet Nam	2	0.2%
23	Ecuador	2	0.2%
24	Belgium	2	0.2%
25	Jamaica	2	0.2%
26	Korea, Republic of	2	0.2%
27	Italy	1	0.1%
28	Bangladesh	1	0.1%
29	Estonia	1	0.1%
30	Cyprus	1	0.1%
31	Seychelles	1	0.1%
32	Singapore	1	0.1%
33	Portugal	1	0.1%
34	Luxembourg	1	0.1%