Rank	Countries/Territories	Count	Percent
1	United States	424	36.9%
2	China	247	21.5%
3	Germany	52	4.5%
4	Romania	34	3%
5	Spain	31	2.7%
6	Italy	30	2.6%
7	India	29	2.5%
8	United Kingdom	27	2.3%
9	Netherlands	22	1.9%
10	Ireland	17	1.5%
11	Japan	17	1.5%
12	Korea, Republic of	14	1.2%
13	Canada	13	1.1%
14	Moldova, Republic of	12	1%
15	Sweden	12	1%
16	France	11	1%
17	Czech Republic	11	1%
18	Hong Kong	9	0.8%
19	Iran, Islamic Republic of	9	0.8%
20	Singapore	9	0.8%
21	Turkey	9	0.8%
22	Australia	8	0.7%
23	Belgium	8	0.7%
24	Thailand	7	0.6%
25	Mexico	7	0.6%
26	Brazil	6	0.5%
27	Austria	6	0.5%
28	Viet Nam	5	0.4%
29	South Africa	5	0.4%
30	Russia	4	0.3%
31	Taiwan	4	0.3%
32	Bulgaria	4	0.3%
33	Greece	4	0.3%
34	Ethiopia	4	0.3%
35	Cyprus	3	0.3%
36	Guatemala	3	0.3%
37	Iraq	3	0.3%
38	Indonesia	3	0.3%
39	Poland	3	0.3%
40	Switzerland	3	0.3%
41	Venezuela, Bolivarian Republic of	2	0.2%
42	Malaysia	2	0.2%
43	Norway	2	0.2%
44	Denmark	2	0.2%
45	Egypt	2	0.2%
46	Colombia	2	0.2%
47	Algeria	1	0.1%
48	Bangladesh	1	0.1%
49	Hungary	1	0.1%
50	Pakistan	1	0.1%
51	Philippines	1	0.1%
52	Morocco	1	0.1%
53	Portugal	1	0.1%
54	Saudi Arabia	1	0.1%