Rank	Countries/Territories	Count	Percent
1	United States	493	42.5%
2	China	442	38.1%
3	Germany	78	6.7%
4	Canada	38	3.3%
5	France	23	2%
6	Norway	12	1%
7	Korea, Republic of	11	0.9%
8	Japan	9	0.8%
9	Netherlands	7	0.6%
10	Cyprus	7	0.6%
11	Hong Kong	6	0.5%
12	Singapore	5	0.4%
13	Australia	4	0.3%
14	Ireland	4	0.3%
15	Malaysia	3	0.3%
16	Argentina	3	0.3%
17	Sweden	3	0.3%
18	Spain	2	0.2%
19	Ukraine	2	0.2%
20	Iran, Islamic Republic of	2	0.2%
21	Mongolia	1	0.1%
22	Romania	1	0.1%
23	Russia	1	0.1%
24	India	1	0.1%
25	Switzerland	1	0.1%