Rank	Countries/Territories	Count	Percent
1	United States	636	35.2%
2	China	406	22.5%
3	Bulgaria	174	9.6%
4	Japan	137	7.6%
5	Germany	74	4.1%
6	Australia	72	4%
7	Korea, Republic of	61	3.4%
8	France	57	3.2%
9	Singapore	27	1.5%
10	Netherlands	21	1.2%
11	Taiwan	16	0.9%
12	Canada	16	0.9%
13	Ukraine	14	0.8%
14	Hong Kong	11	0.6%
15	India	10	0.6%
16	Indonesia	8	0.4%
17	Malaysia	8	0.4%
18	Argentina	7	0.4%
19	Cyprus	7	0.4%
20	United Kingdom	6	0.3%
21	Russia	6	0.3%
22	Turkey	4	0.2%
23	Sweden	4	0.2%
24	Ireland	4	0.2%
25	Latvia	3	0.2%
26	Spain	3	0.2%
27	Portugal	2	0.1%
28	South Africa	2	0.1%
29	Iran, Islamic Republic of	2	0.1%
30	Israel	1	0.1%
31	Czech Republic	1	0.1%
32	Georgia	1	0.1%
33	Bangladesh	1	0.1%
34	Mongolia	1	0.1%
35	Norway	1	0.1%
36	Poland	1	0.1%