Rank	Countries/Territories	Count	Percent
1	United States	334	36.5%
2	China	218	23.9%
3	Bulgaria	42	4.6%
4	Australia	28	3.1%
5	India	22	2.4%
6	Netherlands	22	2.4%
7		19	2.1%
8	Germany	17	1.9%
9	Canada	16	1.8%
10	France	16	1.8%
11	United Kingdom	16	1.8%
12	Japan	15	1.6%
13	Russia	13	1.4%
14	Brazil	13	1.4%
15	Korea, Republic of	9	1%
16	Italy	9	1%
17	Morocco	9	1%
18	Hong Kong	8	0.9%
19	Ireland	7	0.8%
20	Latvia	7	0.8%
21	Saudi Arabia	7	0.8%
22	Bangladesh	6	0.7%
23	Romania	6	0.7%
24	Taiwan	6	0.7%
25	South Africa	5	0.5%
26	Lithuania	5	0.5%
27	Mexico	5	0.5%
28	Singapore	4	0.4%
29	Spain	4	0.4%
30	Turkey	3	0.3%
31	Ukraine	3	0.3%
32	New Zealand	3	0.3%
33	Norway	3	0.3%
34	Philippines	2	0.2%
35	Portugal	2	0.2%
36	Israel	2	0.2%
37	Iran, Islamic Republic of	2	0.2%
38	Iraq	2	0.2%
39	Indonesia	1	0.1%
40	Pakistan	1	0.1%
41	Lebanon	1	0.1%
42	Sweden	1	0.1%