Rank	Countries/Territories	Count	Percent
1	United States	227	27.3%
2	China	212	25.5%
3	Japan	86	10.3%
4		73	8.8%
5	Germany	57	6.8%
6	Singapore	35	4.2%
7	Korea, Republic of	17	2%
8	Nigeria	11	1.3%
9	India	9	1.1%
10	Netherlands	7	0.8%
11	United Kingdom	7	0.8%
12	Ireland	6	0.7%
13	Libya	6	0.7%
14	France	6	0.7%
15	Australia	6	0.7%
16	Canada	6	0.7%
17	Switzerland	5	0.6%
18	South Africa	3	0.4%
19	Spain	3	0.4%
20	Tanzania, United Republic of	3	0.4%
21	Turkey	3	0.4%
22	Pakistan	3	0.4%
23	Poland	3	0.4%
24	Belgium	3	0.4%
25	Cyprus	3	0.4%
26	Hong Kong	3	0.4%
27	Saudi Arabia	3	0.4%
28	Viet Nam	3	0.4%
29	Ghana	2	0.2%
30	Indonesia	2	0.2%
31	Iran, Islamic Republic of	2	0.2%
32	Latvia	2	0.2%
33	Czech Republic	2	0.2%
34	Bangladesh	2	0.2%
35	Romania	2	0.2%
36	Mongolia	2	0.2%
37	Thailand	2	0.2%
38	Taiwan	2	0.2%
39	Ukraine	1	0.1%
40	Russia	1	0.1%
41	Algeria	1	0.1%
42	Argentina	1	0.1%