Rank	Countries/Territories	Count	Percent
1	United States	301	37.2%
2	China	257	31.7%
3	Germany	112	13.8%
4	Russia	31	3.8%
5	Netherlands	21	2.6%
6	Korea, Republic of	18	2.2%
7	France	15	1.9%
8	India	7	0.9%
9	Sweden	6	0.7%
10	United Kingdom	6	0.7%
11	Spain	4	0.5%
12	Singapore	3	0.4%
13	Japan	3	0.4%
14	Denmark	3	0.4%
15	Egypt	3	0.4%
16	Hong Kong	2	0.2%
17	Cyprus	2	0.2%
18	Canada	2	0.2%
19	Iran, Islamic Republic of	2	0.2%
20	Ireland	2	0.2%
21	Malaysia	2	0.2%
22	Mongolia	2	0.2%
23	Switzerland	1	0.1%
24	Turkey	1	0.1%
25	Norway	1	0.1%
26	Philippines	1	0.1%
27	Portugal	1	0.1%
28	Australia	1	0.1%