Rank	Countries/Territories	Count	Percent
1	United States	452	48.8%
2	China	199	21.5%
3	Germany	69	7.5%
4	India	38	4.1%
5	Russia	21	2.3%
6	Korea, Republic of	18	1.9%
7	Brazil	17	1.8%
8	Japan	16	1.7%
9	Canada	15	1.6%
10	Latvia	14	1.5%
11	Netherlands	7	0.8%
12	Taiwan	6	0.6%
13	Turkey	6	0.6%
14	Ireland	4	0.4%
15	Hong Kong	4	0.4%
16	Egypt	3	0.3%
17	Colombia	3	0.3%
18	Australia	3	0.3%
19	South Africa	3	0.3%
20	Spain	2	0.2%
21	Ukraine	2	0.2%
22	United Kingdom	2	0.2%
23	Belgium	2	0.2%
24	Nigeria	2	0.2%
25	Argentina	2	0.2%
26	Croatia	2	0.2%
27	Yemen	2	0.2%
28	Zambia	1	0.1%
29	Singapore	1	0.1%
30	Viet Nam	1	0.1%
31	Cyprus	1	0.1%
32	Algeria	1	0.1%
33	Bangladesh	1	0.1%
34	France	1	0.1%
35	Iran, Islamic Republic of	1	0.1%
36	Norway	1	0.1%
37	Israel	1	0.1%
38	Sweden	1	0.1%
39	Switzerland	1	0.1%