Rank	Countries/Territories	Count	Percent
1	United States	352	42.4%
2	China	253	30.4%
3	Germany	99	11.9%
4		32	3.9%
5	France	17	2%
6	Japan	12	1.4%
7	Spain	9	1.1%
8	United Kingdom	7	0.8%
9	Ireland	7	0.8%
10	Iran, Islamic Republic of	6	0.7%
11	Canada	5	0.6%
12	Singapore	4	0.5%
13	Netherlands	4	0.5%
14	Viet Nam	4	0.5%
15	Australia	3	0.4%
16	Cyprus	2	0.2%
17	Egypt	2	0.2%
18	Bulgaria	2	0.2%
19	Poland	2	0.2%
20	Russia	1	0.1%
21	Serbia	1	0.1%
22	Norway	1	0.1%
23	Switzerland	1	0.1%
24	India	1	0.1%
25	Malaysia	1	0.1%
26	Chile	1	0.1%
27	Bangladesh	1	0.1%
28	Brazil	1	0.1%