Rank	Countries/Territories	Count	Percent
1	United States	237	36.5%
2	China	184	28.3%
3	Germany	98	15.1%
4	Russia	31	4.8%
5	Netherlands	20	3.1%
6	Korea, Republic of	18	2.8%
7	France	12	1.8%
8	India	7	1.1%
9	United Kingdom	6	0.9%
10	Sweden	6	0.9%
11	Spain	4	0.6%
12	Japan	3	0.5%
13	Egypt	3	0.5%
14	Canada	2	0.3%
15	Denmark	2	0.3%
16	Iran, Islamic Republic of	2	0.3%
17	Ireland	2	0.3%
18	Malaysia	2	0.3%
19	Mongolia	2	0.3%
20	Singapore	2	0.3%
21	Switzerland	1	0.2%
22	Turkey	1	0.2%
23	Norway	1	0.2%
24	Philippines	1	0.2%
25	Portugal	1	0.2%
26	Cyprus	1	0.2%
27	Hong Kong	1	0.2%