Rank	Countries/Territories	Count	Percent
1	United States	425	39.1%
2	China	317	29.2%
3	Germany	107	9.9%
4	France	35	3.2%
5	Japan	28	2.6%
6	Iran, Islamic Republic of	24	2.2%
7	Singapore	21	1.9%
8	India	17	1.6%
9	Netherlands	14	1.3%
10	United Kingdom	13	1.2%
11	Ukraine	10	0.9%
12	Pakistan	10	0.9%
13	Switzerland	8	0.7%
14	Cyprus	8	0.7%
15	Hungary	7	0.6%
16	Hong Kong	6	0.6%
17	Egypt	5	0.5%
18	Canada	5	0.5%
19	South Africa	5	0.5%
20	Mongolia	3	0.3%
21	Argentina	3	0.3%
22	Australia	2	0.2%
23	Bangladesh	2	0.2%
24	Iraq	2	0.2%
25	Macao	2	0.2%
26	Taiwan	2	0.2%
27	Russia	1	0.1%
28	Norway	1	0.1%
29	Korea, Republic of	1	0.1%
30	Luxembourg	1	0.1%
31	Georgia	1	0.1%