Rank	Countries/Territories	Count	Percent
1	United States	280	50.4%
2	China	118	21.2%
3	Germany	66	11.9%
4	Canada	32	5.8%
5	France	20	3.6%
6	Singapore	8	1.4%
7	Russia	4	0.7%
8	Cyprus	4	0.7%
9	Denmark	3	0.5%
10	Belgium	3	0.5%
11	Argentina	3	0.5%
12	Netherlands	3	0.5%
13	Norway	2	0.4%
14	Colombia	2	0.4%
15	Taiwan	2	0.4%
16	Switzerland	1	0.2%
17	Australia	1	0.2%
18	Poland	1	0.2%
19	India	1	0.2%
20	Iran, Islamic Republic of	1	0.2%
21	Malaysia	1	0.2%