Rank	Countries/Territories	Count	Percent
1	United States	309	39.1%
2	China	258	32.7%
3	Germany	82	10.4%
4	France	22	2.8%
5	Canada	22	2.8%
6	India	16	2%
7	Netherlands	8	1%
8	Korea, Republic of	7	0.9%
9	United Kingdom	6	0.8%
10	Ukraine	5	0.6%
11	Ireland	5	0.6%
12	Japan	5	0.6%
13	Australia	5	0.6%
14	Cyprus	5	0.6%
15	Egypt	3	0.4%
16	Romania	3	0.4%
17	Singapore	3	0.4%
18	Switzerland	2	0.3%
19	Russia	2	0.3%
20	Saudi Arabia	2	0.3%
21	Philippines	2	0.3%
22	Viet Nam	2	0.3%
23	Colombia	2	0.3%
24	Bangladesh	2	0.3%
25	Bulgaria	2	0.3%
26	Ghana	2	0.3%
27	Greece	1	0.1%
28	Jordan	1	0.1%
29	Argentina	1	0.1%
30	Ethiopia	1	0.1%
31	Norway	1	0.1%
32	Sierra Leone	1	0.1%
33	Taiwan	1	0.1%
34	Uganda	1	0.1%