Rank	Countries/Territories	Count	Percent
1	United States	520	45.8%
2	China	362	31.9%
3	Germany	106	9.3%
4	Japan	25	2.2%
5	France	20	1.8%
6	Russia	13	1.1%
7	Singapore	13	1.1%
8	Netherlands	12	1.1%
9	Canada	9	0.8%
10	United Kingdom	8	0.7%
11	Argentina	7	0.6%
12	Cyprus	6	0.5%
13	Australia	5	0.4%
14	Norway	4	0.4%
15	Switzerland	3	0.3%
16	Iran, Islamic Republic of	3	0.3%
17	Ireland	2	0.2%
18	Hong Kong	2	0.2%
19	New Zealand	2	0.2%
20	Mongolia	2	0.2%
21	Bangladesh	2	0.2%
22	Bulgaria	2	0.2%
23	Finland	2	0.2%
24	Ukraine	2	0.2%
25	Pakistan	2	0.2%
26	Romania	1	0.1%
27	Czech Republic	1	0.1%