Rank	Countries/Territories	Count	Percent
1	United States	426	41.4%
2	China	375	36.5%
3	Germany	108	10.5%
4	France	19	1.8%
5	Netherlands	19	1.8%
6	Japan	14	1.4%
7	Singapore	13	1.3%
8	United Kingdom	7	0.7%
9	Ireland	6	0.6%
10	Canada	5	0.5%
11	South Africa	4	0.4%
12	Russia	4	0.4%
13	Bulgaria	3	0.3%
14	Argentina	3	0.3%
15	Hong Kong	3	0.3%
16	Iran, Islamic Republic of	2	0.2%
17	Malaysia	2	0.2%
18	Mongolia	2	0.2%
19	Bangladesh	2	0.2%
20	Greece	2	0.2%
21	Cyprus	2	0.2%
22	Philippines	2	0.2%
23	Nigeria	2	0.2%
24	Norway	1	0.1%
25	Ukraine	1	0.1%
26	Korea, Republic of	1	0.1%