Rank	Countries/Territories	Count	Percent
1	United States	216	33.2%
2	Bulgaria	118	18.1%
3	China	71	10.9%
4	India	36	5.5%
5	South Africa	28	4.3%
6	Germany	22	3.4%
7	United Kingdom	22	3.4%
8	Brazil	19	2.9%
9	Italy	16	2.5%
10	Spain	9	1.4%
11	Russia	8	1.2%
12	Canada	8	1.2%
13	Australia	7	1.1%
14	Finland	7	1.1%
15	Korea, Republic of	7	1.1%
16	Malaysia	6	0.9%
17	Netherlands	5	0.8%
18	Switzerland	4	0.6%
19	Ireland	4	0.6%
20	Iran, Islamic Republic of	4	0.6%
21	Hong Kong	4	0.6%
22	Poland	3	0.5%
23	Japan	3	0.5%
24	Mexico	2	0.3%
25	Serbia	2	0.3%
26	Slovakia	2	0.3%
27	Iraq	2	0.3%
28	Austria	2	0.3%
29	Bangladesh	2	0.3%
30	Belgium	2	0.3%
31	Argentina	2	0.3%
32	Czech Republic	1	0.2%
33	Portugal	1	0.2%
34	Romania	1	0.2%
35	Tunisia	1	0.2%
36	Monaco	1	0.2%
37	Norway	1	0.2%
38	Lithuania	1	0.2%
39	Viet Nam	1	0.2%