Rank	Countries/Territories	Count	Percent
1	United States	253	37.8%
2	China	199	29.7%
3	Germany	94	14.1%
4	Russia	21	3.1%
5	Japan	17	2.5%
6	France	14	2.1%
7	Netherlands	13	1.9%
8	Singapore	11	1.6%
9	Iran, Islamic Republic of	6	0.9%
10	Canada	6	0.9%
11	Ukraine	6	0.9%
12	Hong Kong	5	0.7%
13	Australia	4	0.6%
14	United Kingdom	4	0.6%
15	Cyprus	3	0.4%
16	Belgium	2	0.3%
17	Malaysia	2	0.3%
18	South Africa	2	0.3%
19	Taiwan	2	0.3%
20	Poland	1	0.1%
21	Sweden	1	0.1%
22	Austria	1	0.1%
23	Ethiopia	1	0.1%
24	India	1	0.1%