Rank	Countries/Territories	Count	Percent
1	United States	550	37.4%
2	China	437	29.7%
3	Germany	178	12.1%
4	Latvia	75	5.1%
5	France	43	2.9%
6	Japan	25	1.7%
7	Russia	25	1.7%
8	Netherlands	21	1.4%
9	United Kingdom	21	1.4%
10	Canada	19	1.3%
11	Korea, Republic of	17	1.2%
12	Singapore	9	0.6%
13	Ireland	8	0.5%
14	Australia	6	0.4%
15	India	5	0.3%
16	Switzerland	4	0.3%
17	Taiwan	3	0.2%
18	Uganda	3	0.2%
19	Norway	3	0.2%
20	Cyprus	3	0.2%
21	Iran, Islamic Republic of	2	0.1%
22	Peru	2	0.1%
23	Malaysia	2	0.1%
24	Mexico	2	0.1%
25	Mongolia	1	0.1%
26	Romania	1	0.1%
27	Slovenia	1	0.1%
28	South Africa	1	0.1%
29	Spain	1	0.1%
30	Italy	1	0.1%
31	Luxembourg	1	0.1%
32	Argentina	1	0.1%
33	Hong Kong	1	0.1%