Rank	Countries/Territories	Count	Percent
1	United States	423	49.6%
2	China	231	27.1%
3	Germany	78	9.1%
4	France	26	3%
5	Japan	15	1.8%
6	Spain	14	1.6%
7	Canada	10	1.2%
8	United Kingdom	8	0.9%
9	Iran, Islamic Republic of	7	0.8%
10	Hong Kong	6	0.7%
11	Malaysia	5	0.6%
12	Singapore	4	0.5%
13	Mongolia	3	0.4%
14	Netherlands	3	0.4%
15	Cyprus	3	0.4%
16	Australia	2	0.2%
17	Hungary	2	0.2%
18	India	2	0.2%
19	Taiwan	2	0.2%
20	Ukraine	2	0.2%
21	Sweden	1	0.1%
22	Switzerland	1	0.1%
23	Russia	1	0.1%
24	Bangladesh	1	0.1%
25	Brazil	1	0.1%
26	Argentina	1	0.1%
27	Greece	1	0.1%