Rank	Countries/Territories	Count	Percent
1	United States	327	35.6%
2	China	318	34.6%
3	Germany	49	5.3%
4	Canada	22	2.4%
5	Iran, Islamic Republic of	21	2.3%
6	India	18	2%
7	Australia	18	2%
8	France	17	1.8%
9	Japan	16	1.7%
10	Singapore	10	1.1%
11	Norway	9	1%
12	Indonesia	9	1%
13	Israel	8	0.9%
14	Korea, Republic of	7	0.8%
15	Netherlands	7	0.8%
16	Russia	7	0.8%
17	Egypt	6	0.7%
18	Greece	5	0.5%
19	Denmark	5	0.5%
20	Taiwan	5	0.5%
21	Argentina	4	0.4%
22	Ireland	4	0.4%
23	Cyprus	3	0.3%
24	Sweden	3	0.3%
25	Latvia	3	0.3%
26	United Kingdom	3	0.3%
27	Libya	2	0.2%
28	Nigeria	2	0.2%
29	Philippines	2	0.2%
30	Armenia	2	0.2%
31	Brazil	1	0.1%
32	Bulgaria	1	0.1%
33	Ethiopia	1	0.1%
34	Ukraine	1	0.1%
35	Mexico	1	0.1%
36	Kuwait	1	0.1%
37	Kazakhstan	1	0.1%