Rank	Countries/Territories	Count	Percent
1	United States	623	41.6%
2	China	415	27.7%
3	Germany	237	15.8%
4	France	47	3.1%
5	Latvia	34	2.3%
6	Japan	26	1.7%
7	Korea, Republic of	12	0.8%
8	Netherlands	12	0.8%
9	Singapore	12	0.8%
10	Switzerland	8	0.5%
11	United Kingdom	8	0.5%
12	Cyprus	7	0.5%
13	Canada	5	0.3%
14	Argentina	5	0.3%
15	Australia	5	0.3%
16	Hong Kong	4	0.3%
17	India	4	0.3%
18	Italy	4	0.3%
19	Russia	3	0.2%
20	Ukraine	3	0.2%
21	Viet Nam	3	0.2%
22	Bangladesh	3	0.2%
23	Bulgaria	2	0.1%
24	Iran, Islamic Republic of	2	0.1%
25	Ireland	2	0.1%
26	Hungary	2	0.1%
27	Malaysia	2	0.1%
28	Mongolia	2	0.1%
29	Yemen	2	0.1%
30	South Africa	2	0.1%
31	Spain	1	0.1%
32	Panama	1	0.1%
33	Poland	1	0.1%