Rank	Countries/Territories	Count	Percent
1	United States	456	45.1%
2	China	194	19.2%
3	Germany	42	4.2%
4	India	34	3.4%
5	Romania	31	3.1%
6	Russia	21	2.1%
7	Italy	19	1.9%
8	Japan	18	1.8%
9	Brazil	18	1.8%
10	Singapore	15	1.5%
11	Netherlands	12	1.2%
12	Korea, Republic of	11	1.1%
13	Canada	10	1%
14	Taiwan	9	0.9%
15	Tanzania, United Republic of	9	0.9%
16	United Kingdom	8	0.8%
17	Ireland	7	0.7%
18	France	6	0.6%
19	Indonesia	6	0.6%
20	Australia	6	0.6%
21	Cyprus	6	0.6%
22	Jordan	5	0.5%
23	Turkey	5	0.5%
24	Syrian Arab Republic	5	0.5%
25	Venezuela, Bolivarian Republic of	4	0.4%
26	Saudi Arabia	4	0.4%
27	Denmark	4	0.4%
28	Egypt	4	0.4%
29	Hong Kong	4	0.4%
30	Pakistan	3	0.3%
31	Peru	3	0.3%
32	Israel	3	0.3%
33	South Africa	3	0.3%
34	Slovenia	2	0.2%
35	Switzerland	2	0.2%
36	Serbia	2	0.2%
37	Iraq	2	0.2%
38	Greece	2	0.2%
39	Argentina	2	0.2%
40	Bulgaria	2	0.2%
41	Cameroon	1	0.1%
42	Iran, Islamic Republic of	1	0.1%
43	Poland	1	0.1%
44	Nicaragua	1	0.1%
45	Norway	1	0.1%
46	Mexico	1	0.1%
47	Mongolia	1	0.1%
48	Morocco	1	0.1%
49	Thailand	1	0.1%
50	Spain	1	0.1%
51	Viet Nam	1	0.1%