Rank	Countries/Territories	Count	Percent
1	United States	397	39.3%
2	China	346	34.3%
3	Germany	146	14.5%
4	France	34	3.4%
5	Russia	12	1.2%
6	Canada	11	1.1%
7	Netherlands	9	0.9%
8	Japan	8	0.8%
9	Ukraine	5	0.5%
10	Qatar	4	0.4%
11	Singapore	4	0.4%
12	Nigeria	3	0.3%
13	Latvia	3	0.3%
14	Mexico	3	0.3%
15	Hong Kong	3	0.3%
16	Cyprus	3	0.3%
17	Australia	2	0.2%
18	Bangladesh	2	0.2%
19	Bulgaria	2	0.2%
20	India	2	0.2%
21	Iran, Islamic Republic of	2	0.2%
22	Ireland	2	0.2%
23	Spain	2	0.2%
24	Sweden	1	0.1%
25	Switzerland	1	0.1%
26	Norway	1	0.1%
27	New Zealand	1	0.1%
28	Korea, Republic of	1	0.1%