Rank	Countries/Territories	Count	Percent
1	United States	539	43.6%
2	China	225	18.2%
3	Germany	102	8.2%
4	Russia	37	3%
5	India	31	2.5%
6	France	26	2.1%
7	Netherlands	24	1.9%
8	Japan	24	1.9%
9	Korea, Republic of	16	1.3%
10	Canada	16	1.3%
11	United Kingdom	16	1.3%
12	Ireland	15	1.2%
13	Romania	14	1.1%
14	Mexico	13	1.1%
15	Australia	13	1.1%
16	Italy	10	0.8%
17	Iran, Islamic Republic of	8	0.6%
18	Iraq	8	0.6%
19	Egypt	7	0.6%
20	Malaysia	7	0.6%
21	Pakistan	7	0.6%
22	Singapore	7	0.6%
23	South Africa	7	0.6%
24	Cyprus	6	0.5%
25	Indonesia	6	0.5%
26	Turkey	6	0.5%
27	Sweden	6	0.5%
28	Taiwan	4	0.3%
29	Ukraine	4	0.3%
30	Spain	4	0.3%
31	New Zealand	3	0.2%
32	Hong Kong	3	0.2%
33	Ethiopia	3	0.2%
34	Burundi	3	0.2%
35	Brazil	2	0.2%
36	Ecuador	2	0.2%
37	Saudi Arabia	2	0.2%
38	Sierra Leone	2	0.2%
39	Thailand	2	0.2%
40	Switzerland	2	0.2%
41	United Arab Emirates	1	0.1%
42	Norway	1	0.1%
43	Kuwait	1	0.1%
44	Latvia	1	0.1%
45	Argentina	1	0.1%