Rank	Countries/Territories	Count	Percent
1	United States	410	39.2%
2	China	319	30.5%
3	Germany	76	7.3%
4	Latvia	42	4%
5	Japan	34	3.3%
6	Switzerland	28	2.7%
7	Netherlands	18	1.7%
8	France	14	1.3%
9	India	12	1.1%
10	Korea, Republic of	11	1.1%
11	Singapore	10	1%
12	United Kingdom	8	0.8%
13	Canada	8	0.8%
14	Russia	5	0.5%
15	Taiwan	5	0.5%
16	Poland	4	0.4%
17	Cyprus	4	0.4%
18	Argentina	4	0.4%
19	Australia	4	0.4%
20	Colombia	3	0.3%
21	Hong Kong	3	0.3%
22	Iran, Islamic Republic of	2	0.2%
23	Israel	2	0.2%
24	Dominican Republic	2	0.2%
25	Lithuania	2	0.2%
26	Mexico	2	0.2%
27	Mongolia	2	0.2%
28	Spain	2	0.2%
29	Sweden	2	0.2%
30	Viet Nam	2	0.2%
31	Ukraine	1	0.1%
32	Malaysia	1	0.1%
33	Norway	1	0.1%
34	Czech Republic	1	0.1%
35	Italy	1	0.1%
36	Indonesia	1	0.1%