Rank	Countries/Territories	Count	Percent
1	United States	433	45.2%
2	China	280	29.3%
3	Germany	72	7.5%
4	Japan	24	2.5%
5	United Kingdom	16	1.7%
6	Singapore	12	1.3%
7	Italy	10	1%
8	Netherlands	10	1%
9	Nigeria	9	0.9%
10	Canada	9	0.9%
11	France	9	0.9%
12	Korea, Republic of	9	0.9%
13	Spain	9	0.9%
14	Cyprus	6	0.6%
15	Bulgaria	6	0.6%
16	Australia	5	0.5%
17	Ukraine	5	0.5%
18	Russia	5	0.5%
19	Switzerland	4	0.4%
20	Iran, Islamic Republic of	4	0.4%
21	Greece	3	0.3%
22	Viet Nam	3	0.3%
23	United Arab Emirates	2	0.2%
24	Sweden	2	0.2%
25	Ireland	2	0.2%
26	Philippines	2	0.2%
27	Brazil	2	0.2%
28	Bangladesh	1	0.1%
29	Bolivia, Plurinational State of	1	0.1%
30	Poland	1	0.1%
31	India	1	0.1%