Rank	Countries/Territories	Count	Percent
1	United States	324	41.3%
2	China	177	22.5%
3	Germany	94	12%
4	Korea, Republic of	36	4.6%
5	France	35	4.5%
6	Canada	15	1.9%
7	Japan	14	1.8%
8	Singapore	10	1.3%
9	United Kingdom	9	1.1%
10	Netherlands	8	1%
11	Australia	8	1%
12	India	6	0.8%
13	Cyprus	6	0.8%
14	Iran, Islamic Republic of	5	0.6%
15	Ireland	4	0.5%
16	Malaysia	4	0.5%
17	Mauritius	4	0.5%
18	Poland	4	0.5%
19	Russia	4	0.5%
20	Norway	3	0.4%
21	Bulgaria	3	0.4%
22	Indonesia	2	0.3%
23	Philippines	2	0.3%
24	Romania	2	0.3%
25	Thailand	2	0.3%
26	Switzerland	1	0.1%
27	Ethiopia	1	0.1%
28	Brazil	1	0.1%
29	Pakistan	1	0.1%