Rank	Countries/Territories	Count	Percent
1	United States	405	45.1%
2	China	301	33.5%
3	Germany	61	6.8%
4	Japan	23	2.6%
5	Singapore	13	1.4%
6	Ghana	11	1.2%
7	France	10	1.1%
8	Ireland	9	1%
9	Australia	9	1%
10	Ukraine	9	1%
11	Romania	7	0.8%
12	Netherlands	5	0.6%
13	Mexico	5	0.6%
14	Canada	4	0.4%
15	Norway	4	0.4%
16	Cyprus	3	0.3%
17	India	3	0.3%
18	Iran, Islamic Republic of	2	0.2%
19	Malaysia	2	0.2%
20	Argentina	2	0.2%
21	Bangladesh	2	0.2%
22	Philippines	2	0.2%
23	Thailand	2	0.2%
24	Sweden	1	0.1%
25	Switzerland	1	0.1%
26	Hong Kong	1	0.1%
27	Mongolia	1	0.1%