Rank	Countries/Territories	Count	Percent
1	United States	521	45.6%
2	China	289	25.3%
3	Germany	94	8.2%
4	Korea, Republic of	46	4%
5	Japan	26	2.3%
6	France	25	2.2%
7	Australia	13	1.1%
8	Netherlands	13	1.1%
9	Switzerland	10	0.9%
10	Viet Nam	8	0.7%
11	South Africa	7	0.6%
12	India	7	0.6%
13	Spain	6	0.5%
14	Pakistan	6	0.5%
15	Malaysia	5	0.4%
16	Mongolia	5	0.4%
17	Senegal	4	0.3%
18	Singapore	4	0.3%
19	Latvia	3	0.3%
20	Iran, Islamic Republic of	3	0.3%
21	Ethiopia	3	0.3%
22	Belarus	3	0.3%
23	Canada	3	0.3%
24	Cyprus	3	0.3%
25	Uganda	3	0.3%
26	Taiwan	3	0.3%
27	Tajikistan	2	0.2%
28	Thailand	2	0.2%
29	United Kingdom	2	0.2%
30	Zambia	2	0.2%
31	Egypt	2	0.2%
32	Colombia	2	0.2%
33	Argentina	2	0.2%
34	Ireland	2	0.2%
35	Hong Kong	2	0.2%
36	Lithuania	1	0.1%
37	Philippines	1	0.1%
38	Romania	1	0.1%
39	Russia	1	0.1%
40	Slovakia	1	0.1%
41	Sweden	1	0.1%
42	Syrian Arab Republic	1	0.1%
43	Israel	1	0.1%
44	Indonesia	1	0.1%
45	Ghana	1	0.1%
46	Algeria	1	0.1%
47	Turkey	1	0.1%