Rank	Countries/Territories	Count	Percent
1	United States	508	42.4%
2	China	375	31.3%
3	Germany	144	12%
4	Japan	32	2.7%
5	India	29	2.4%
6	Russia	18	1.5%
7	Korea, Republic of	17	1.4%
8	Hong Kong	10	0.8%
9	Ireland	9	0.8%
10	Netherlands	7	0.6%
11	Latvia	5	0.4%
12	Canada	5	0.4%
13	Cyprus	5	0.4%
14	Romania	4	0.3%
15	Singapore	3	0.3%
16	Argentina	3	0.3%
17	Australia	3	0.3%
18	Iran, Islamic Republic of	3	0.3%
19	Bulgaria	2	0.2%
20	Egypt	2	0.2%
21	Spain	2	0.2%
22	United Kingdom	2	0.2%
23	Viet Nam	2	0.2%
24	Poland	1	0.1%
25	Ukraine	1	0.1%
26	Moldova, Republic of	1	0.1%
27	France	1	0.1%
28	Bangladesh	1	0.1%
29	Belarus	1	0.1%
30	Belgium	1	0.1%
31	Brazil	1	0.1%
32	Italy	1	0.1%