Rank	Countries/Territories	Count	Percent
1	United States	143	38.5%
2	China	87	23.5%
3	Germany	44	11.9%
4	India	15	4%
5	Canada	15	4%
6	Iran, Islamic Republic of	12	3.2%
7	Japan	7	1.9%
8	Singapore	7	1.9%
9	Netherlands	6	1.6%
10	Cameroon	6	1.6%
11	France	4	1.1%
12	Peru	3	0.8%
13	Spain	2	0.5%
14	Malaysia	2	0.5%
15	Thailand	2	0.5%
16	United Kingdom	2	0.5%
17	Cyprus	2	0.5%
18	Argentina	2	0.5%
19	Norway	2	0.5%
20	Ireland	2	0.5%
21	Korea, Republic of	1	0.3%
22	Australia	1	0.3%
23	Brazil	1	0.3%
24	Algeria	1	0.3%
25	Switzerland	1	0.3%
26	Russia	1	0.3%