Rank	Countries/Territories	Count	Percent
1	United States	507	45.3%
2	China	287	25.6%
3	Germany	210	18.8%
4	France	17	1.5%
5	Japan	16	1.4%
6	Korea, Republic of	12	1.1%
7	Netherlands	12	1.1%
8	Switzerland	8	0.7%
9	Singapore	7	0.6%
10	Cyprus	4	0.4%
11	Australia	4	0.4%
12	Argentina	3	0.3%
13	Canada	3	0.3%
14	Viet Nam	3	0.3%
15	United Kingdom	3	0.3%
16	Yemen	2	0.2%
17	Bulgaria	2	0.2%
18	Malaysia	2	0.2%
19	Mongolia	2	0.2%
20	Hong Kong	2	0.2%
21	Iran, Islamic Republic of	2	0.2%
22	Ireland	2	0.2%
23	Italy	2	0.2%
24	India	1	0.1%
25	Bangladesh	1	0.1%
26	South Africa	1	0.1%
27	Spain	1	0.1%
28	Ukraine	1	0.1%
29	Panama	1	0.1%
30	Poland	1	0.1%
31	Russia	1	0.1%