Rank	Countries/Territories	Count	Percent
1	United States	310	37.2%
2	China	267	32.1%
3	Germany	59	7.1%
4	Sweden	23	2.8%
5	United Kingdom	21	2.5%
6	India	15	1.8%
7	France	15	1.8%
8	Japan	15	1.8%
9	Brazil	14	1.7%
10	Canada	10	1.2%
11	Italy	8	1%
12	Netherlands	8	1%
13	Singapore	6	0.7%
14	Cyprus	5	0.6%
15	Korea, Republic of	5	0.6%
16	Ireland	4	0.5%
17	Burkina Faso	4	0.5%
18	Spain	4	0.5%
19	Switzerland	4	0.5%
20	Turkey	4	0.5%
21	Pakistan	4	0.5%
22	Ukraine	3	0.4%
23	Taiwan	3	0.4%
24	Viet Nam	2	0.2%
25	Poland	2	0.2%
26	New Zealand	2	0.2%
27	Nepal	2	0.2%
28	Argentina	2	0.2%
29	Australia	2	0.2%
30	Austria	2	0.2%
31	Iran, Islamic Republic of	2	0.2%
32	Malaysia	1	0.1%
33	Mongolia	1	0.1%
34	Costa Rica	1	0.1%
35	Norway	1	0.1%
36	Romania	1	0.1%
37	Russia	1	0.1%