Rank	Countries/Territories	Count	Percent
1	United States	339	42.1%
2	China	262	32.5%
3	Germany	84	10.4%
4	Singapore	22	2.7%
5	Japan	14	1.7%
6	Russia	10	1.2%
7	Mongolia	9	1.1%
8	Korea, Republic of	8	1%
9	Netherlands	5	0.6%
10	Canada	5	0.6%
11	France	5	0.6%
12	India	4	0.5%
13	Cyprus	4	0.5%
14	Italy	4	0.5%
15	Ireland	3	0.4%
16	Taiwan	3	0.4%
17	Thailand	3	0.4%
18	United Kingdom	3	0.4%
19	Ukraine	2	0.2%
20	Viet Nam	2	0.2%
21	Philippines	2	0.2%
22	Saudi Arabia	2	0.2%
23	Egypt	2	0.2%
24	Argentina	2	0.2%
25	Iran, Islamic Republic of	2	0.2%
26	Australia	1	0.1%
27	Mexico	1	0.1%
28	Turkey	1	0.1%
29	South Africa	1	0.1%
30	Switzerland	1	0.1%