Rank	Countries/Territories	Count	Percent
1	United States	524	38.8%
2	China	522	38.6%
3	Germany	124	9.2%
4	Canada	20	1.5%
5	Japan	17	1.3%
6	Netherlands	17	1.3%
7	Australia	16	1.2%
8	France	15	1.1%
9	Korea, Republic of	13	1%
10	India	9	0.7%
11	United Kingdom	9	0.7%
12	Senegal	7	0.5%
13	Singapore	7	0.5%
14	Poland	7	0.5%
15	Ireland	6	0.4%
16	Argentina	6	0.4%
17	Cyprus	6	0.4%
18	Iran, Islamic Republic of	4	0.3%
19	Turkey	3	0.2%
20	Russia	3	0.2%
21	Saudi Arabia	3	0.2%
22	Switzerland	2	0.1%
23	Uruguay	2	0.1%
24	Hungary	2	0.1%
25	Israel	2	0.1%
26	Indonesia	2	0.1%
27	Romania	1	0.1%
28	Denmark	1	0.1%
29	Taiwan	1	0.1%
30	Sri Lanka	1	0.1%