Rank	Countries/Territories	Count	Percent
1	United States	407	42.8%
2	China	239	25.1%
3	Germany	75	7.9%
4	Japan	33	3.5%
5	Bulgaria	29	3%
6	France	22	2.3%
7	Netherlands	22	2.3%
8	United Kingdom	15	1.6%
9	South Africa	14	1.5%
10	Australia	11	1.2%
11	Iran, Islamic Republic of	8	0.8%
12	Singapore	8	0.8%
13	Canada	7	0.7%
14	Korea, Republic of	5	0.5%
15	Ukraine	5	0.5%
16	Viet Nam	5	0.5%
17	Russia	4	0.4%
18	Bangladesh	4	0.4%
19	Belgium	4	0.4%
20	Argentina	3	0.3%
21	Cyprus	3	0.3%
22	Finland	3	0.3%
23	Turkey	3	0.3%
24	Taiwan	2	0.2%
25	Saudi Arabia	2	0.2%
26	Philippines	2	0.2%
27	Qatar	2	0.2%
28	Mauritius	2	0.2%
29	Greece	2	0.2%
30	Bolivia, Plurinational State of	2	0.2%
31	Brazil	2	0.2%
32	Austria	2	0.2%
33	Hong Kong	1	0.1%
34	Norway	1	0.1%
35	Sweden	1	0.1%
36	Switzerland	1	0.1%