Rank	Countries/Territories	Count	Percent
1	United States	372	42.1%
2	China	308	34.9%
3	Germany	82	9.3%
4	France	33	3.7%
5	Japan	16	1.8%
6	Iran, Islamic Republic of	13	1.5%
7	Ireland	8	0.9%
8	Canada	8	0.9%
9	Cyprus	7	0.8%
10	Netherlands	5	0.6%
11	Czech Republic	4	0.5%
12	Hong Kong	4	0.5%
13	United Kingdom	4	0.5%
14	Singapore	4	0.5%
15	India	3	0.3%
16	Indonesia	2	0.2%
17	Australia	2	0.2%
18	Norway	2	0.2%
19	Switzerland	2	0.2%
20	Russia	1	0.1%
21	Malaysia	1	0.1%
22	Mongolia	1	0.1%
23	Argentina	1	0.1%