Rank	Countries/Territories	Count	Percent
1	United States	440	34.6%
2	China	389	30.6%
3	Germany	56	4.4%
4	India	48	3.8%
5	Iran, Islamic Republic of	45	3.5%
6	Canada	44	3.5%
7	Netherlands	24	1.9%
8	France	21	1.7%
9	Korea, Republic of	19	1.5%
10	Japan	17	1.3%
11	Ireland	15	1.2%
12	Australia	15	1.2%
13	Bulgaria	12	0.9%
14	Cyprus	11	0.9%
15	United Kingdom	11	0.9%
16	Italy	6	0.5%
17	Lithuania	6	0.5%
18	Macao	6	0.5%
19	Malaysia	5	0.4%
20	Benin	5	0.4%
21	Turkey	5	0.4%
22	Sweden	5	0.4%
23	Taiwan	5	0.4%
24	South Africa	4	0.3%
25	Portugal	4	0.3%
26	Egypt	3	0.2%
27	Ethiopia	3	0.2%
28	Finland	3	0.2%
29	Argentina	3	0.2%
30	Russia	3	0.2%
31	Saudi Arabia	3	0.2%
32	Singapore	3	0.2%
33	Thailand	3	0.2%
34	Ukraine	2	0.2%
35	Libya	2	0.2%
36	Viet Nam	2	0.2%
37	Brazil	2	0.2%
38	Burkina Faso	2	0.2%
39	Romania	2	0.2%
40	Philippines	2	0.2%
41	Nigeria	2	0.2%
42	Kuwait	2	0.2%
43	Lao People's Democratic Republic	2	0.2%
44	Latvia	1	0.1%
45	Mexico	1	0.1%
46	Mongolia	1	0.1%
47	Norway	1	0.1%
48	Poland	1	0.1%
49	Hong Kong	1	0.1%
50	Switzerland	1	0.1%
51	Spain	1	0.1%