Rank	Countries/Territories	Count	Percent
1	United States	389	31.7%
2	China	385	31.3%
3	Germany	55	4.5%
4	Japan	54	4.4%
5	India	44	3.6%
6	Russia	38	3.1%
7	Australia	32	2.6%
8	Italy	26	2.1%
9	Brazil	20	1.6%
10	Latvia	15	1.2%
11	Singapore	15	1.2%
12	Spain	15	1.2%
13	Czech Republic	12	1%
14	Korea, Republic of	11	0.9%
15	Ireland	11	0.9%
16	Portugal	11	0.9%
17	Hong Kong	8	0.7%
18	Canada	8	0.7%
19	Netherlands	7	0.6%
20	Iran, Islamic Republic of	6	0.5%
21	Egypt	6	0.5%
22	France	6	0.5%
23	Thailand	6	0.5%
24	Taiwan	5	0.4%
25	United Kingdom	5	0.4%
26	Greece	3	0.2%
27	Austria	3	0.2%
28	Denmark	3	0.2%
29	Cyprus	3	0.2%
30	Pakistan	3	0.2%
31	Norway	2	0.2%
32	Mexico	2	0.2%
33	Bangladesh	2	0.2%
34	Argentina	2	0.2%
35	Turkey	2	0.2%
36	Viet Nam	2	0.2%
37	Ukraine	1	0.1%
38	Romania	1	0.1%
39	Saudi Arabia	1	0.1%
40	Sweden	1	0.1%
41	South Africa	1	0.1%
42	Ethiopia	1	0.1%
43	Indonesia	1	0.1%
44	Mongolia	1	0.1%
45	Lithuania	1	0.1%
46	Palestine, State of	1	0.1%
47	Israel	1	0.1%
48	Jordan	1	0.1%