Rank	Countries/Territories	Count	Percent
1	United States	448	48%
2	China	310	33.2%
3	Germany	68	7.3%
4	Canada	36	3.9%
5	France	17	1.8%
6	Korea, Republic of	9	1%
7	Netherlands	6	0.6%
8	Ireland	4	0.4%
9	Japan	4	0.4%
10	Cyprus	4	0.4%
11	Australia	3	0.3%
12	Malaysia	3	0.3%
13	Singapore	3	0.3%
14	Sweden	3	0.3%
15	Spain	2	0.2%
16	Iran, Islamic Republic of	2	0.2%
17	Ukraine	2	0.2%
18	Norway	2	0.2%
19	Argentina	2	0.2%
20	Hong Kong	1	0.1%
21	India	1	0.1%
22	Romania	1	0.1%
23	Russia	1	0.1%
24	Mongolia	1	0.1%
25	Switzerland	1	0.1%