Rank	Countries/Territories	Count	Percent
1	United States	494	44.1%
2	China	304	27.1%
3	Germany	152	13.6%
4	Canada	43	3.8%
5	Japan	14	1.2%
6	France	13	1.2%
7	Korea, Republic of	9	0.8%
8	Switzerland	8	0.7%
9	Singapore	7	0.6%
10	Spain	7	0.6%
11	Cyprus	7	0.6%
12	India	6	0.5%
13	Netherlands	6	0.5%
14	Italy	6	0.5%
15	Taiwan	5	0.4%
16	United Kingdom	4	0.4%
17	Hong Kong	4	0.4%
18	Ireland	4	0.4%
19	Poland	3	0.3%
20	Viet Nam	3	0.3%
21	Iran, Islamic Republic of	3	0.3%
22	Greece	2	0.2%
23	Malaysia	2	0.2%
24	Argentina	2	0.2%
25	Australia	2	0.2%
26	Mongolia	2	0.2%
27	New Zealand	1	0.1%
28	Philippines	1	0.1%
29	Thailand	1	0.1%
30	Turkey	1	0.1%
31	Ukraine	1	0.1%
32	Brazil	1	0.1%
33	Czech Republic	1	0.1%
34	Egypt	1	0.1%
35	Mexico	1	0.1%