Rank	Countries/Territories	Count	Percent
1	United States	432	43.6%
2	China	325	32.8%
3	Germany	79	8%
4	France	52	5.2%
5	Canada	29	2.9%
6	Netherlands	15	1.5%
7	Switzerland	11	1.1%
8	Ireland	9	0.9%
9	India	7	0.7%
10	Argentina	5	0.5%
11	Singapore	4	0.4%
12	Japan	3	0.3%
13	Australia	3	0.3%
14	Belgium	3	0.3%
15	Hong Kong	3	0.3%
16	Iran, Islamic Republic of	2	0.2%
17	Spain	2	0.2%
18	Sweden	2	0.2%
19	Russia	2	0.2%
20	Korea, Republic of	1	0.1%
21	Norway	1	0.1%
22	Poland	1	0.1%