Rank	Countries/Territories	Count	Percent
1	United States	428	43.2%
2	China	353	35.6%
3	Germany	82	8.3%
4	Canada	34	3.4%
5	Bulgaria	21	2.1%
6	France	17	1.7%
7	Netherlands	12	1.2%
8	Australia	8	0.8%
9	Japan	5	0.5%
10	United Kingdom	5	0.5%
11	Norway	4	0.4%
12	India	3	0.3%
13	Cyprus	3	0.3%
14	Hong Kong	2	0.2%
15	Mongolia	2	0.2%
16	Lithuania	2	0.2%
17	Slovakia	2	0.2%
18	Sweden	2	0.2%
19	Taiwan	2	0.2%
20	Ukraine	1	0.1%
21	South Africa	1	0.1%
22	Singapore	1	0.1%
23	Malaysia	1	0.1%