Rank	Countries/Territories	Count	Percent
1	United States	337	33.3%
2	China	327	32.3%
3	Germany	98	9.7%
4	Singapore	54	5.3%
5	Japan	44	4.3%
6	Canada	24	2.4%
7	France	14	1.4%
8	Switzerland	14	1.4%
9	Korea, Republic of	11	1.1%
10	India	9	0.9%
11	Netherlands	8	0.8%
12	Ireland	7	0.7%
13	Australia	7	0.7%
14	Cyprus	6	0.6%
15	Egypt	4	0.4%
16	Iran, Islamic Republic of	4	0.4%
17	Poland	4	0.4%
18	Russia	4	0.4%
19	United Kingdom	4	0.4%
20	Ukraine	3	0.3%
21	Sweden	3	0.3%
22	Argentina	3	0.3%
23	Bulgaria	3	0.3%
24	Iraq	2	0.2%
25	Hong Kong	2	0.2%
26	Turkey	2	0.2%
27	Portugal	2	0.2%
28	Romania	2	0.2%
29	Malaysia	2	0.2%
30	Mexico	1	0.1%
31	Mongolia	1	0.1%
32	Pakistan	1	0.1%
33	Uruguay	1	0.1%
34	Viet Nam	1	0.1%
35	Ghana	1	0.1%
36	Austria	1	0.1%
37	Ethiopia	1	0.1%
38	Colombia	1	0.1%