Rank	Countries/Territories	Count	Percent
1	United States	489	37.3%
2	China	397	30.3%
3	Germany	67	5.1%
4	India	45	3.4%
5	Bulgaria	43	3.3%
6	Japan	25	1.9%
7	Canada	22	1.7%
8	France	21	1.6%
9	Russia	19	1.4%
10	Netherlands	15	1.1%
11	Belgium	13	1%
12	Korea, Republic of	12	0.9%
13	Iran, Islamic Republic of	11	0.8%
14	Sweden	10	0.8%
15	Taiwan	10	0.8%
16	Singapore	9	0.7%
17	United Kingdom	9	0.7%
18	Australia	9	0.7%
19	Argentina	6	0.5%
20	Denmark	6	0.5%
21	Hong Kong	6	0.5%
22	Romania	6	0.5%
23	Italy	5	0.4%
24	Norway	5	0.4%
25	Greece	4	0.3%
26	Cyprus	4	0.3%
27	Thailand	4	0.3%
28	Turkey	4	0.3%
29	Poland	4	0.3%
30	Nigeria	3	0.2%
31	Brazil	3	0.2%
32	Egypt	3	0.2%
33	Iraq	3	0.2%
34	Peru	2	0.2%
35	Philippines	2	0.2%
36	Israel	2	0.2%
37	New Zealand	2	0.2%
38	South Africa	2	0.2%
39	Spain	1	0.1%
40	Saudi Arabia	1	0.1%
41	Pakistan	1	0.1%
42	Ireland	1	0.1%
43	Malaysia	1	0.1%
44	Mexico	1	0.1%
45	Finland	1	0.1%
46	Hungary	1	0.1%
47	Bangladesh	1	0.1%
48	Czech Republic	1	0.1%