Rank	Countries/Territories	Count	Percent
1	United States	573	37.3%
2	China	521	33.9%
3	Germany	142	9.2%
4	France	57	3.7%
5	Bulgaria	26	1.7%
6	India	23	1.5%
7	Netherlands	18	1.2%
8	Singapore	17	1.1%
9	Australia	17	1.1%
10	United Kingdom	16	1%
11	Japan	13	0.8%
12	Slovakia	11	0.7%
13	Canada	10	0.7%
14	Cyprus	10	0.7%
15	Italy	7	0.5%
16	Korea, Republic of	7	0.5%
17	Spain	6	0.4%
18	Norway	5	0.3%
19	Greece	5	0.3%
20	Brazil	4	0.3%
21	Bangladesh	4	0.3%
22	Latvia	4	0.3%
23	Russia	4	0.3%
24	Thailand	4	0.3%
25	Ukraine	3	0.2%
26	Romania	3	0.2%
27	Switzerland	2	0.1%
28	Lithuania	2	0.1%
29	Mexico	2	0.1%
30	Oman	2	0.1%
31	Philippines	2	0.1%
32	Poland	2	0.1%
33	Iceland	2	0.1%
34	Ireland	2	0.1%
35	Iran, Islamic Republic of	1	0.1%
36	Hong Kong	1	0.1%
37	Belgium	1	0.1%
38	Cote D'ivoire	1	0.1%
39	Qatar	1	0.1%
40	Sweden	1	0.1%
41	Saudi Arabia	1	0.1%
42	Senegal	1	0.1%
43	South Africa	1	0.1%
44	Turkey	1	0.1%