Rank	Countries/Territories	Count	Percent
1	United States	501	48.7%
2	China	291	28.3%
3	Germany	51	5%
4	India	29	2.8%
5	Russia	23	2.2%
6	Korea, Republic of	17	1.7%
7	Japan	17	1.7%
8	United Kingdom	13	1.3%
9	Netherlands	11	1.1%
10	Australia	8	0.8%
11	Spain	7	0.7%
12	Singapore	6	0.6%
13	Ireland	6	0.6%
14	Austria	4	0.4%
15	Denmark	4	0.4%
16	Taiwan	4	0.4%
17	Norway	3	0.3%
18	France	3	0.3%
19	Italy	3	0.3%
20	Iran, Islamic Republic of	2	0.2%
21	Belgium	2	0.2%
22	Brazil	2	0.2%
23	Canada	2	0.2%
24	Chile	2	0.2%
25	Pakistan	2	0.2%
26	Poland	2	0.2%
27	Portugal	2	0.2%
28	Argentina	2	0.2%
29	Turkey	1	0.1%
30	Ukraine	1	0.1%
31	Sweden	1	0.1%
32	Romania	1	0.1%
33	New Zealand	1	0.1%
34	Lithuania	1	0.1%
35	Bangladesh	1	0.1%
36	Ghana	1	0.1%
37	Hong Kong	1	0.1%
38	Jordan	1	0.1%