Rank	Countries/Territories	Count	Percent
1	United States	378	47.7%
2	China	188	23.7%
3	Germany	74	9.3%
4		26	3.3%
5	Russia	20	2.5%
6	France	19	2.4%
7	Singapore	9	1.1%
8	Japan	7	0.9%
9	Korea, Republic of	7	0.9%
10	Poland	6	0.8%
11	United Kingdom	6	0.8%
12	Australia	6	0.8%
13	Netherlands	5	0.6%
14	Israel	4	0.5%
15	Ukraine	4	0.5%
16	Canada	4	0.5%
17	Cyprus	4	0.5%
18	Hong Kong	3	0.4%
19	Switzerland	3	0.4%
20	Mongolia	2	0.3%
21	India	2	0.3%
22	Iran, Islamic Republic of	2	0.3%
23	Iraq	2	0.3%
24	Finland	2	0.3%
25	Costa Rica	2	0.3%
26	Bosnia and Herzegovina	2	0.3%
27	Argentina	2	0.3%
28	Chile	1	0.1%
29	Egypt	1	0.1%
30	Ireland	1	0.1%
31	Sweden	1	0.1%