Rank	Countries/Territories	Count	Percent
1	United States	409	45.1%
2	China	159	17.5%
3	Germany	104	11.5%
4	Russia	39	4.3%
5	France	29	3.2%
6	Canada	28	3.1%
7	Netherlands	20	2.2%
8	Japan	17	1.9%
9	India	14	1.5%
10	Australia	13	1.4%
11	Singapore	10	1.1%
12	Ecuador	7	0.8%
13	Poland	6	0.7%
14	Korea, Republic of	5	0.6%
15	Belgium	5	0.6%
16	Argentina	4	0.4%
17	Brazil	4	0.4%
18	Norway	4	0.4%
19	Sweden	4	0.4%
20	South Africa	3	0.3%
21	Thailand	2	0.2%
22	Pakistan	2	0.2%
23	Philippines	2	0.2%
24	Indonesia	2	0.2%
25	Iran, Islamic Republic of	2	0.2%
26	Cuba	2	0.2%
27	Lithuania	2	0.2%
28	Mexico	2	0.2%
29	Hong Kong	1	0.1%
30	Colombia	1	0.1%
31	Bermuda	1	0.1%
32	Romania	1	0.1%
33	United Kingdom	1	0.1%
34	Taiwan	1	0.1%