Rank	Countries/Territories	Count	Percent
1	United States	657	39.1%
2	China	602	35.8%
3	Germany	107	6.4%
4	Czech Republic	66	3.9%
5	Japan	59	3.5%
6	France	31	1.8%
7	Russia	28	1.7%
8		24	1.4%
9	Singapore	20	1.2%
10	Cyprus	10	0.6%
11	Australia	9	0.5%
12	Egypt	8	0.5%
13	Canada	8	0.5%
14	Switzerland	8	0.5%
15	Turkey	6	0.4%
16	Netherlands	5	0.3%
17	Iran, Islamic Republic of	4	0.2%
18	Hong Kong	4	0.2%
19	Argentina	3	0.2%
20	Poland	3	0.2%
21	Portugal	3	0.2%
22	Ireland	2	0.1%
23	Bangladesh	2	0.1%
24	India	2	0.1%
25	Latvia	2	0.1%
26	Luxembourg	1	0.1%
27	Malaysia	1	0.1%
28	Mongolia	1	0.1%
29	Norway	1	0.1%
30	South Africa	1	0.1%
31	Spain	1	0.1%
32	Sri Lanka	1	0.1%
33	Ukraine	1	0.1%
34	United Kingdom	1	0.1%