Rank	Countries/Territories	Count	Percent
1	United States	425	39.6%
2	China	355	33.1%
3	Germany	140	13%
4	Canada	43	4%
5	France	37	3.4%
6	Netherlands	15	1.4%
7	Japan	12	1.1%
8	India	7	0.7%
9	Argentina	6	0.6%
10	Australia	5	0.5%
11	Ireland	5	0.5%
12	Cyprus	4	0.4%
13	Korea, Republic of	4	0.4%
14	Singapore	4	0.4%
15	Russia	2	0.2%
16	Bulgaria	2	0.2%
17	Iran, Islamic Republic of	2	0.2%
18	Ukraine	2	0.2%
19	Mongolia	1	0.1%
20	South Africa	1	0.1%
21	Switzerland	1	0.1%
22	Taiwan	1	0.1%