Rank	Countries/Territories	Count	Percent
1	United States	134	35%
2	China	124	32.4%
3	Germany	56	14.6%
4	Canada	11	2.9%
5	Singapore	9	2.3%
6	Japan	8	2.1%
7	India	7	1.8%
8	Iran, Islamic Republic of	7	1.8%
9	Korea, Republic of	5	1.3%
10	Netherlands	3	0.8%
11	Hungary	2	0.5%
12	Botswana	2	0.5%
13	Cyprus	2	0.5%
14	Ethiopia	2	0.5%
15	France	2	0.5%
16	Switzerland	2	0.5%
17	United Arab Emirates	2	0.5%
18	Ukraine	1	0.3%
19	Australia	1	0.3%
20	Belgium	1	0.3%
21	Ireland	1	0.3%
22	Norway	1	0.3%