Rank	Countries/Territories	Count	Percent
1	United States	324	35.1%
2	China	318	34.5%
3	Germany	61	6.6%
4	Japan	34	3.7%
5	Colombia	20	2.2%
6	Netherlands	17	1.8%
7	Australia	16	1.7%
8	Korea, Republic of	12	1.3%
9	Russia	12	1.3%
10	Singapore	11	1.2%
11	Pakistan	9	1%
12	United Kingdom	8	0.9%
13	Cuba	7	0.8%
14	Canada	6	0.7%
15	France	6	0.7%
16	Iran, Islamic Republic of	5	0.5%
17	Ireland	5	0.5%
18	Spain	5	0.5%
19	India	5	0.5%
20	Norway	5	0.5%
21	Tanzania, United Republic of	3	0.3%
22	South Africa	3	0.3%
23	Malaysia	2	0.2%
24	Mexico	2	0.2%
25	Israel	2	0.2%
26	Greece	2	0.2%
27	Cyprus	2	0.2%
28	Ecuador	2	0.2%
29	Egypt	2	0.2%
30	Taiwan	2	0.2%
31	Viet Nam	2	0.2%
32	Chile	1	0.1%
33	Bangladesh	1	0.1%
34	Brazil	1	0.1%
35	Argentina	1	0.1%
36	Italy	1	0.1%
37	Indonesia	1	0.1%
38	New Zealand	1	0.1%
39	Sweden	1	0.1%
40	Palestine, State of	1	0.1%
41	Poland	1	0.1%
42	Portugal	1	0.1%
43	Romania	1	0.1%