Rank	Countries/Territories	Count	Percent
1	United States	480	37.1%
2	China	474	36.7%
3	Germany	100	7.7%
4	Japan	50	3.9%
5	France	27	2.1%
6	Mexico	19	1.5%
7	Singapore	19	1.5%
8	Australia	17	1.3%
9	Canada	13	1%
10	Netherlands	13	1%
11	Norway	8	0.6%
12	India	8	0.6%
13	Greece	7	0.5%
14	Spain	7	0.5%
15	Argentina	6	0.5%
16	Ecuador	6	0.5%
17	Iran, Islamic Republic of	5	0.4%
18	Cyprus	4	0.3%
19	Ghana	3	0.2%
20	Latvia	3	0.2%
21	Malaysia	2	0.2%
22	South Africa	2	0.2%
23	Switzerland	2	0.2%
24	Thailand	2	0.2%
25	Italy	2	0.2%
26	United Kingdom	2	0.2%
27	Iraq	2	0.2%
28	Czech Republic	2	0.2%
29	Finland	2	0.2%
30	Austria	1	0.1%
31	Israel	1	0.1%
32	Ukraine	1	0.1%
33	Sweden	1	0.1%
34	Romania	1	0.1%
35	Montenegro	1	0.1%