Rank	Countries/Territories	Count	Percent
1	United States	491	43%
2	China	432	37.8%
3	Germany	78	6.8%
4	Canada	37	3.2%
5	France	23	2%
6	Norway	12	1%
7	Korea, Republic of	11	1%
8	Japan	9	0.8%
9	Netherlands	6	0.5%
10	Hong Kong	6	0.5%
11	Cyprus	6	0.5%
12	Australia	4	0.3%
13	Ireland	4	0.3%
14	Singapore	4	0.3%
15	Sweden	3	0.3%
16	Malaysia	3	0.3%
17	Argentina	3	0.3%
18	Iran, Islamic Republic of	2	0.2%
19	Spain	2	0.2%
20	Ukraine	2	0.2%
21	Switzerland	1	0.1%
22	Mongolia	1	0.1%
23	Romania	1	0.1%
24	Russia	1	0.1%
25	India	1	0.1%