Rank	Countries/Territories	Count	Percent
1	United States	271	44.3%
2	China	92	15%
3	Germany	39	6.4%
4	Ireland	39	6.4%
5	India	19	3.1%
6	Netherlands	16	2.6%
7	Switzerland	16	2.6%
8	Japan	8	1.3%
9	Canada	8	1.3%
10	Korea, Republic of	7	1.1%
11	Brazil	6	1%
12	Romania	5	0.8%
13	Russia	5	0.8%
14	Singapore	5	0.8%
15	Taiwan	5	0.8%
16	Thailand	5	0.8%
17	Serbia	4	0.7%
18	Mexico	4	0.7%
19	Iran, Islamic Republic of	4	0.7%
20	Italy	4	0.7%
21	Australia	4	0.7%
22	Greece	4	0.7%
23	Hong Kong	3	0.5%
24	Malaysia	3	0.5%
25	Portugal	3	0.5%
26	United Kingdom	3	0.5%
27	Viet Nam	2	0.3%
28	Myanmar	2	0.3%
29	South Africa	2	0.3%
30	Spain	2	0.3%
31	Norway	2	0.3%
32	Pakistan	2	0.3%
33	Indonesia	2	0.3%
34	Finland	2	0.3%
35	Georgia	2	0.3%
36	Cyprus	2	0.3%
37	Egypt	1	0.2%
38	Bangladesh	1	0.2%
39	Belgium	1	0.2%
40	Bolivia, Plurinational State of	1	0.2%
41	Hungary	1	0.2%
42	Peru	1	0.2%
43	Philippines	1	0.2%
44	Poland	1	0.2%
45	Saudi Arabia	1	0.2%
46	Turkey	1	0.2%