Rank	Countries/Territories	Count	Percent
1	United States	468	38.8%
2	China	155	12.9%
3	Bulgaria	131	10.9%
4	Germany	62	5.1%
5	India	55	4.6%
6	United Kingdom	37	3.1%
7	South Africa	28	2.3%
8	Italy	26	2.2%
9	Korea, Republic of	20	1.7%
10	Brazil	19	1.6%
11	Canada	16	1.3%
12	Netherlands	16	1.3%
13	Russia	12	1%
14	Australia	11	0.9%
15	Spain	10	0.8%
16	Turkey	9	0.7%
17	Japan	9	0.7%
18	Poland	8	0.7%
19	Hong Kong	8	0.7%
20	Finland	8	0.7%
21	Slovakia	7	0.6%
22	Switzerland	6	0.5%
23	Senegal	6	0.5%
24	France	6	0.5%
25	Austria	6	0.5%
26	Malaysia	6	0.5%
27	Ireland	5	0.4%
28	Iran, Islamic Republic of	5	0.4%
29	Hungary	3	0.2%
30	Bangladesh	3	0.2%
31	Belgium	3	0.2%
32	New Zealand	3	0.2%
33	Mexico	3	0.2%
34	Tunisia	3	0.2%
35	Ukraine	3	0.2%
36	Serbia	2	0.2%
37	Singapore	2	0.2%
38	Saudi Arabia	2	0.2%
39	Norway	2	0.2%
40	Portugal	2	0.2%
41	Romania	2	0.2%
42	Israel	2	0.2%
43	Lithuania	2	0.2%
44	Argentina	2	0.2%
45	Iraq	2	0.2%
46	Georgia	1	0.1%
47	Czech Republic	1	0.1%
48	Mauritius	1	0.1%
49	Moldova, Republic of	1	0.1%
50	Monaco	1	0.1%
51	Mongolia	1	0.1%
52	Taiwan	1	0.1%
53	Thailand	1	0.1%
54	Viet Nam	1	0.1%