Rank	Countries/Territories	Count	Percent
1	United States	264	26.5%
2	China	221	22.2%
3	Germany	105	10.6%
4	Russia	71	7.1%
5	Nigeria	35	3.5%
6	Canada	32	3.2%
7	India	20	2%
8	Taiwan	19	1.9%
9	United Kingdom	16	1.6%
10	France	15	1.5%
11	Cameroon	15	1.5%
12	Turkey	14	1.4%
13	Japan	11	1.1%
14	Netherlands	11	1.1%
15	Austria	9	0.9%
16	Spain	9	0.9%
17	Switzerland	9	0.9%
18	Egypt	8	0.8%
19	Ghana	7	0.7%
20	Singapore	7	0.7%
21	Morocco	6	0.6%
22	Colombia	6	0.6%
23	Mauritius	6	0.6%
24	Ireland	5	0.5%
25	Guinea	5	0.5%
26	Cyprus	5	0.5%
27	Brazil	5	0.5%
28	Bangladesh	4	0.4%
29	Greece	4	0.4%
30	Italy	4	0.4%
31	Iran, Islamic Republic of	4	0.4%
32	Malaysia	3	0.3%
33	New Zealand	3	0.3%
34	Indonesia	3	0.3%
35	Ethiopia	3	0.3%
36	South Africa	3	0.3%
37	Viet Nam	3	0.3%
38	Zambia	2	0.2%
39	Romania	2	0.2%
40	Thailand	2	0.2%
41	Togo	2	0.2%
42	Tunisia	2	0.2%
43	Estonia	2	0.2%
44	Algeria	2	0.2%
45	Australia	2	0.2%
46	Mexico	2	0.2%
47	Mongolia	1	0.1%
48	Panama	1	0.1%
49	Peru	1	0.1%
50	Kazakhstan	1	0.1%
51	Korea, Republic of	1	0.1%
52	Burundi	1	0.1%
53	Congo	1	0.1%