Rank	Countries/Territories	Count	Percent
1	United States	244	34.3%
2	China	162	22.8%
3	Germany	76	10.7%
4	United Kingdom	29	4.1%
5	Netherlands	27	3.8%
6	India	17	2.4%
7	Bulgaria	10	1.4%
8	Singapore	10	1.4%
9	Switzerland	9	1.3%
10	France	9	1.3%
11	Japan	8	1.1%
12	Canada	8	1.1%
13	Australia	7	1%
14	Brazil	7	1%
15	Iran, Islamic Republic of	7	1%
16	Italy	7	1%
17	Poland	7	1%
18	Korea, Republic of	6	0.8%
19	Greece	5	0.7%
20	Serbia	5	0.7%
21	Ireland	4	0.6%
22	Honduras	3	0.4%
23	Cyprus	3	0.4%
24	Philippines	3	0.4%
25	Sweden	3	0.4%
26	Turkey	3	0.4%
27	Thailand	2	0.3%
28	Senegal	2	0.3%
29	Norway	2	0.3%
30	Peru	2	0.3%
31	Jordan	2	0.3%
32	Ethiopia	2	0.3%
33	Argentina	2	0.3%
34	Bosnia and Herzegovina	2	0.3%
35	Denmark	1	0.1%
36	Hungary	1	0.1%
37	Israel	1	0.1%
38	Kazakhstan	1	0.1%
39	Libya	1	0.1%
40	Luxembourg	1	0.1%
41	Malaysia	1	0.1%
42	Mexico	1	0.1%
43	New Zealand	1	0.1%
44	Nigeria	1	0.1%
45	Portugal	1	0.1%
46	Saudi Arabia	1	0.1%
47	Spain	1	0.1%
48	Taiwan	1	0.1%
49	Ukraine	1	0.1%
50	Viet Nam	1	0.1%