Rank	Countries/Territories	Count	Percent
1	United States	291	34.5%
2	China	273	32.3%
3	Germany	92	10.9%
4	Poland	30	3.6%
5	Canada	26	3.1%
6	Korea, Republic of	19	2.3%
7	Russia	17	2%
8	Japan	14	1.7%
9	Singapore	11	1.3%
10	United Kingdom	11	1.3%
11	France	9	1.1%
12	India	8	0.9%
13	Iran, Islamic Republic of	8	0.9%
14	Netherlands	5	0.6%
15	Taiwan	5	0.6%
16	Australia	4	0.5%
17	Cyprus	4	0.5%
18	Italy	2	0.2%
19	Malaysia	2	0.2%
20	Sweden	2	0.2%
21	Switzerland	2	0.2%
22	Ukraine	2	0.2%
23	New Zealand	2	0.2%
24	Norway	1	0.1%
25	Mongolia	1	0.1%
26	Greece	1	0.1%
27	Hong Kong	1	0.1%
28	Denmark	1	0.1%