Rank	Countries/Territories	Count	Percent
1	United States	272	45%
2	China	138	22.8%
3	Germany	79	13.1%
4	Canada	20	3.3%
5	Japan	16	2.6%
6	Netherlands	11	1.8%
7	France	7	1.2%
8	Australia	7	1.2%
9	Singapore	7	1.2%
10	Mongolia	6	1%
11	Brazil	6	1%
12	Cyprus	6	1%
13	India	5	0.8%
14	Hong Kong	4	0.7%
15	Lithuania	4	0.7%
16	Russia	3	0.5%
17	United Kingdom	2	0.3%
18	Malaysia	2	0.3%
19	Norway	2	0.3%
20	Iran, Islamic Republic of	2	0.3%
21		2	0.3%
22	Argentina	2	0.3%
23	Ukraine	1	0.2%