Rank	Countries/Territories	Count	Percent
1	United States	511	41.1%
2	China	423	34%
3	Germany	85	6.8%
4	India	78	6.3%
5	Japan	31	2.5%
6	Russia	18	1.4%
7	Brazil	15	1.2%
8	Ireland	12	1%
9	Korea, Republic of	7	0.6%
10	Canada	7	0.6%
11	Singapore	7	0.6%
12	France	6	0.5%
13	Australia	5	0.4%
14	Senegal	5	0.4%
15	Netherlands	4	0.3%
16	Ukraine	4	0.3%
17	Taiwan	3	0.2%
18	Hong Kong	3	0.2%
19	Iran, Islamic Republic of	2	0.2%
20	Croatia	2	0.2%
21	Togo	2	0.2%
22	Mongolia	2	0.2%
23	Switzerland	2	0.2%
24	Sweden	1	0.1%
25	Norway	1	0.1%
26	Turkey	1	0.1%
27	United Kingdom	1	0.1%
28	Viet Nam	1	0.1%
29	Finland	1	0.1%
30	Argentina	1	0.1%
31	Bangladesh	1	0.1%
32	Malaysia	1	0.1%
33	Israel	1	0.1%