Rank	Countries/Territories	Count	Percent
1	United States	281	42.4%
2	China	201	30.4%
3	Germany	62	9.4%
4	France	39	5.9%
5	Canada	28	4.2%
6	Netherlands	13	2%
7	India	6	0.9%
8	Ireland	6	0.9%
9	Singapore	4	0.6%
10	Belgium	3	0.5%
11	Argentina	3	0.5%
12	Hong Kong	3	0.5%
13	Australia	2	0.3%
14	Spain	2	0.3%
15	Sweden	2	0.3%
16	Japan	2	0.3%
17	Iran, Islamic Republic of	2	0.3%
18	Switzerland	1	0.2%
19	Norway	1	0.2%
20	Russia	1	0.2%