Rank	Countries/Territories	Count	Percent
1	United States	266	35.9%
2	China	157	21.2%
3	Bulgaria	40	5.4%
4	Australia	27	3.6%
5	India	22	3%
6	Netherlands	22	3%
7		19	2.6%
8	Germany	14	1.9%
9	Japan	14	1.9%
10	Russia	13	1.8%
11	Brazil	12	1.6%
12	Canada	12	1.6%
13	France	12	1.6%
14	United Kingdom	12	1.6%
15	Korea, Republic of	8	1.1%
16	Hong Kong	8	1.1%
17	Morocco	7	0.9%
18	Romania	6	0.8%
19	Saudi Arabia	6	0.8%
20	Ireland	6	0.8%
21	Bangladesh	6	0.8%
22	Lithuania	5	0.7%
23	Mexico	5	0.7%
24	South Africa	5	0.7%
25	Singapore	4	0.5%
26	Latvia	4	0.5%
27	Taiwan	4	0.5%
28	Turkey	3	0.4%
29	New Zealand	3	0.4%
30	Norway	2	0.3%
31	Israel	2	0.3%
32	Italy	2	0.3%
33	Spain	2	0.3%
34	Philippines	2	0.3%
35	Portugal	2	0.3%
36	Iran, Islamic Republic of	2	0.3%
37	Iraq	2	0.3%
38	Lebanon	1	0.1%
39	Sweden	1	0.1%
40	Pakistan	1	0.1%