Rank	Countries/Territories	Count	Percent
1	United States	256	32.9%
2	China	163	20.9%
3	Bulgaria	85	10.9%
4	Germany	35	4.5%
5	United Kingdom	24	3.1%
6	France	18	2.3%
7	Netherlands	17	2.2%
8	Singapore	14	1.8%
9	Australia	14	1.8%
10	Canada	13	1.7%
11	Japan	12	1.5%
12	Korea, Republic of	12	1.5%
13	India	11	1.4%
14	Indonesia	10	1.3%
15	Czech Republic	9	1.2%
16	Spain	9	1.2%
17	Greece	8	1%
18	Hong Kong	8	1%
19	Bangladesh	7	0.9%
20	Brazil	5	0.6%
21	Russia	5	0.6%
22	Slovenia	4	0.5%
23	Cyprus	4	0.5%
24	Israel	4	0.5%
25	Norway	3	0.4%
26	Pakistan	3	0.4%
27	Romania	3	0.4%
28	Viet Nam	3	0.4%
29	Poland	2	0.3%
30	Mexico	2	0.3%
31	Morocco	2	0.3%
32	Saudi Arabia	2	0.3%
33	Sweden	2	0.3%
34	Switzerland	2	0.3%
35	Taiwan	2	0.3%
36	Cambodia	2	0.3%
37	Iran, Islamic Republic of	1	0.1%
38	Hungary	1	0.1%
39	Iceland	1	0.1%
40	Portugal	1	0.1%