Rank	Countries/Territories	Count	Percent
1	United States	534	38.4%
2	China	448	32.2%
3	Germany	164	11.8%
4	Canada	40	2.9%
5	India	21	1.5%
6	Netherlands	19	1.4%
7	Switzerland	12	0.9%
8	Turkey	11	0.8%
9	Japan	11	0.8%
10	Norway	10	0.7%
11	United Kingdom	9	0.6%
12	Taiwan	9	0.6%
13	Singapore	9	0.6%
14	Korea, Republic of	9	0.6%
15	Australia	9	0.6%
16	Czech Republic	9	0.6%
17	Cyprus	7	0.5%
18	Hong Kong	7	0.5%
19	Ireland	7	0.5%
20	Lithuania	6	0.4%
21	Iran, Islamic Republic of	4	0.3%
22	France	4	0.3%
23	Mexico	3	0.2%
24	Portugal	3	0.2%
25	Thailand	3	0.2%
26	Bangladesh	3	0.2%
27	Iraq	2	0.1%
28	Hungary	2	0.1%
29	Malaysia	2	0.1%
30	Saudi Arabia	2	0.1%
31	Nigeria	2	0.1%
32	Peru	2	0.1%
33	Viet Nam	1	0.1%
34	Pakistan	1	0.1%
35	Mongolia	1	0.1%
36	Serbia	1	0.1%
37	South Africa	1	0.1%
38	Argentina	1	0.1%
39	Egypt	1	0.1%