Rank	Countries/Territories	Count	Percent
1	United States	343	40.5%
2	China	188	22.2%
3	Germany	82	9.7%
4	Egypt	28	3.3%
5	Canada	27	3.2%
6	France	19	2.2%
7	India	19	2.2%
8	Russia	15	1.8%
9	Switzerland	13	1.5%
10	Norway	13	1.5%
11	Ireland	12	1.4%
12	United Kingdom	8	0.9%
13	Netherlands	7	0.8%
14	Japan	6	0.7%
15	Philippines	5	0.6%
16	Iran, Islamic Republic of	4	0.5%
17	Ethiopia	4	0.5%
18	Australia	4	0.5%
19	Cyprus	4	0.5%
20	Indonesia	3	0.4%
21	Hong Kong	3	0.4%
22	Korea, Republic of	3	0.4%
23	Malaysia	3	0.4%
24	Singapore	3	0.4%
25	Sri Lanka	2	0.2%
26	Syrian Arab Republic	2	0.2%
27	Portugal	2	0.2%
28	Oman	2	0.2%
29	Israel	2	0.2%
30	Guam	2	0.2%
31	Ecuador	2	0.2%
32	Turkey	2	0.2%
33	Viet Nam	2	0.2%
34	Zimbabwe	2	0.2%
35	Ukraine	1	0.1%
36	United Arab Emirates	1	0.1%
37	Costa Rica	1	0.1%
38	Bangladesh	1	0.1%
39	Argentina	1	0.1%
40	Iraq	1	0.1%
41	Mexico	1	0.1%
42	Mongolia	1	0.1%
43	Pakistan	1	0.1%
44	Taiwan	1	0.1%