Rank	Countries/Territories	Count	Percent
1	United States	421	37.2%
2	China	412	36.4%
3	Germany	117	10.3%
4	Japan	45	4%
5	Latvia	40	3.5%
6	Canada	12	1.1%
7	France	9	0.8%
8	Argentina	9	0.8%
9	Singapore	9	0.8%
10	Australia	7	0.6%
11	India	6	0.5%
12	Iran, Islamic Republic of	6	0.5%
13	Ireland	6	0.5%
14	Norway	6	0.5%
15	Hong Kong	4	0.4%
16	Cyprus	3	0.3%
17	Poland	3	0.3%
18	Netherlands	3	0.3%
19	United Kingdom	2	0.2%
20	Mexico	2	0.2%
21	Mongolia	2	0.2%
22	Brazil	2	0.2%
23	Italy	2	0.2%
24	Lithuania	1	0.1%
25	Czech Republic	1	0.1%
26	Finland	1	0.1%
27	Russia	1	0.1%
28	Switzerland	1	0.1%