Rank	Countries/Territories	Count	Percent
1	United States	258	39.3%
2	China	185	28.2%
3	Germany	85	12.9%
4	Russia	25	3.8%
5	France	18	2.7%
6	Japan	17	2.6%
7	United Kingdom	10	1.5%
8	Ukraine	6	0.9%
9	India	6	0.9%
10	Netherlands	6	0.9%
11	Iran, Islamic Republic of	4	0.6%
12	Canada	4	0.6%
13	Australia	3	0.5%
14	Cyprus	3	0.5%
15	Italy	3	0.5%
16	Switzerland	3	0.5%
17	Turkey	2	0.3%
18	Singapore	2	0.3%
19	Slovenia	2	0.3%
20	Estonia	2	0.3%
21	Indonesia	2	0.3%
22	Ireland	1	0.2%
23	Norway	1	0.2%
24	Pakistan	1	0.2%
25	Philippines	1	0.2%
26	Poland	1	0.2%
27	Egypt	1	0.2%
28	Austria	1	0.2%
29	Argentina	1	0.2%
30	South Africa	1	0.2%
31	Malaysia	1	0.2%
32	Mongolia	1	0.2%