Rank	Countries/Territories	Count	Percent
1	United States	312	36.4%
2	China	241	28.2%
3	Germany	87	10.2%
4	Russia	30	3.5%
5	Spain	17	2%
6	Egypt	15	1.8%
7	France	14	1.6%
8	India	13	1.5%
9	Japan	13	1.5%
10	Singapore	11	1.3%
11	Netherlands	9	1.1%
12	Palestine, State of	9	1.1%
13	Saudi Arabia	8	0.9%
14	Korea, Republic of	7	0.8%
15	Malaysia	7	0.8%
16	Australia	7	0.8%
17	Ireland	6	0.7%
18	Cyprus	5	0.6%
19	Canada	5	0.6%
20	Iran, Islamic Republic of	4	0.5%
21	Ghana	4	0.5%
22	Belgium	3	0.4%
23	Italy	3	0.4%
24	Turkey	3	0.4%
25	United Kingdom	3	0.4%
26	Ukraine	2	0.2%
27	Thailand	2	0.2%
28	Peru	2	0.2%
29	New Zealand	2	0.2%
30	Bangladesh	2	0.2%
31	Czech Republic	2	0.2%
32	Iraq	2	0.2%
33	Israel	1	0.1%
34	Argentina	1	0.1%
35	Brazil	1	0.1%
36	Norway	1	0.1%
37	Lithuania	1	0.1%
38	Taiwan	1	0.1%