Rank	Countries/Territories	Count	Percent
1	United States	302	32.1%
2	China	262	27.8%
3	Germany	61	6.5%
4	Iran, Islamic Republic of	47	5%
5	India	36	3.8%
6	Japan	24	2.6%
7	Netherlands	23	2.4%
8	Canada	17	1.8%
9	France	17	1.8%
10	Singapore	12	1.3%
11	Italy	10	1.1%
12	Romania	9	1%
13	United Kingdom	9	1%
14	Slovakia	8	0.9%
15	Tunisia	8	0.9%
16	Korea, Republic of	8	0.9%
17	Philippines	6	0.6%
18	Egypt	6	0.6%
19	Syrian Arab Republic	6	0.6%
20	Sweden	5	0.5%
21	Indonesia	5	0.5%
22	Malaysia	5	0.5%
23	Mexico	4	0.4%
24	Ireland	4	0.4%
25	Kazakhstan	4	0.4%
26	Australia	4	0.4%
27	Brazil	4	0.4%
28	Thailand	4	0.4%
29	Pakistan	3	0.3%
30	Israel	3	0.3%
31	Hong Kong	2	0.2%
32	New Zealand	2	0.2%
33	Poland	2	0.2%
34	Russia	2	0.2%
35	Bulgaria	2	0.2%
36	Albania	2	0.2%
37	Argentina	2	0.2%
38	Ethiopia	2	0.2%
39	Cyprus	2	0.2%
40	Trinidad and Tobago	2	0.2%
41	Taiwan	1	0.1%
42	Iraq	1	0.1%
43	Ghana	1	0.1%
44	Puerto Rico	1	0.1%
45	Mongolia	1	0.1%