Rank	Countries/Territories	Count	Percent
1	United States	328	39.4%
2	China	186	22.3%
3	Germany	52	6.2%
4	Iran, Islamic Republic of	35	4.2%
5	Canada	31	3.7%
6	India	23	2.8%
7	France	15	1.8%
8	Korea, Republic of	15	1.8%
9	Ireland	14	1.7%
10	Japan	13	1.6%
11	Netherlands	13	1.6%
12	Australia	12	1.4%
13	Bulgaria	10	1.2%
14	United Kingdom	8	1%
15	Cyprus	7	0.8%
16	Macao	6	0.7%
17	Sweden	5	0.6%
18	South Africa	4	0.5%
19	Portugal	4	0.5%
20	Lithuania	4	0.5%
21	Malaysia	4	0.5%
22	Singapore	3	0.4%
23	Ethiopia	3	0.4%
24	Finland	3	0.4%
25	Argentina	3	0.4%
26	Italy	3	0.4%
27	Taiwan	3	0.4%
28	Thailand	2	0.2%
29	Turkey	2	0.2%
30	Viet Nam	2	0.2%
31	Kuwait	2	0.2%
32	Lao People's Democratic Republic	2	0.2%
33	Burkina Faso	2	0.2%
34	Romania	2	0.2%
35	Russia	2	0.2%
36	Nigeria	2	0.2%
37	Norway	1	0.1%
38	Poland	1	0.1%
39	Mexico	1	0.1%
40	Mongolia	1	0.1%
41	Spain	1	0.1%
42	Switzerland	1	0.1%
43	Egypt	1	0.1%
44	Ukraine	1	0.1%