Rank	Countries/Territories	Count	Percent
1	United States	481	53.9%
2	China	221	24.7%
3	Germany	58	6.5%
4	Canada	18	2%
5	Ukraine	17	1.9%
6	Switzerland	16	1.8%
7	Japan	12	1.3%
8	Singapore	10	1.1%
9	Netherlands	9	1%
10	India	9	1%
11	France	8	0.9%
12	Korea, Republic of	6	0.7%
13	Poland	4	0.4%
14	Ireland	3	0.3%
15	Jamaica	2	0.2%
16	Australia	2	0.2%
17	Hong Kong	2	0.2%
18	Cyprus	2	0.2%
19	Denmark	2	0.2%
20	Sweden	2	0.2%
21	United Kingdom	2	0.2%
22	Taiwan	1	0.1%
23	Russia	1	0.1%
24	Brazil	1	0.1%
25	Argentina	1	0.1%
26	Iran, Islamic Republic of	1	0.1%
27	Malaysia	1	0.1%
28	Mexico	1	0.1%