Rank	Countries/Territories	Count	Percent
1	United States	375	28.2%
2	China	309	23.2%
3	Germany	112	8.4%
4	Russia	71	5.3%
5	India	47	3.5%
6	Nigeria	38	2.9%
7	Canada	32	2.4%
8	United Kingdom	24	1.8%
9	France	22	1.7%
10	Taiwan	19	1.4%
11	Cameroon	16	1.2%
12	Turkey	15	1.1%
13	Ethiopia	13	1%
14	Japan	13	1%
15	Romania	12	0.9%
16	Spain	12	0.9%
17	Netherlands	12	0.9%
18	Switzerland	9	0.7%
19	Ghana	9	0.7%
20	Austria	9	0.7%
21	Colombia	8	0.6%
22	Egypt	8	0.6%
23	Sweden	8	0.6%
24	Singapore	7	0.5%
25	Cyprus	7	0.5%
26	Georgia	6	0.5%
27	Italy	6	0.5%
28	Libya	6	0.5%
29	Mauritius	6	0.5%
30	Mexico	6	0.5%
31	Morocco	6	0.5%
32	New Zealand	5	0.4%
33	Thailand	5	0.4%
34	Malaysia	5	0.4%
35	Korea, Republic of	5	0.4%
36	Greece	5	0.4%
37	Guinea	5	0.4%
38	Ireland	5	0.4%
39	Brazil	5	0.4%
40	Bangladesh	4	0.3%
41	Australia	4	0.3%
42	Iran, Islamic Republic of	4	0.3%
43	Portugal	4	0.3%
44	South Africa	4	0.3%
45	Tanzania, United Republic of	3	0.2%
46	Viet Nam	3	0.2%
47	Indonesia	3	0.2%
48	Mongolia	3	0.2%
49	Algeria	2	0.2%
50	Estonia	2	0.2%
51	Zambia	2	0.2%
52	Togo	2	0.2%
53	Tunisia	2	0.2%
54	Ukraine	1	0.1%
55	Pakistan	1	0.1%
56	Panama	1	0.1%
57	Peru	1	0.1%
58	Congo	1	0.1%
59	Burundi	1	0.1%
60	Kazakhstan	1	0.1%