Rank	Countries/Territories	Count	Percent
1	United States	334	37.5%
2	China	271	30.4%
3	Germany	39	4.4%
4	Korea, Republic of	32	3.6%
5	Bulgaria	23	2.6%
6	Italy	15	1.7%
7	Netherlands	12	1.3%
8	Russia	12	1.3%
9	Singapore	11	1.2%
10	Pakistan	11	1.2%
11	India	10	1.1%
12	Australia	9	1%
13	Canada	8	0.9%
14	Hong Kong	8	0.9%
15	France	8	0.9%
16	Japan	7	0.8%
17	Romania	6	0.7%
18	United Kingdom	5	0.6%
19	Viet Nam	5	0.6%
20	Ireland	5	0.6%
21	Brazil	5	0.6%
22	Nepal	4	0.4%
23	Iran, Islamic Republic of	4	0.4%
24	Turkey	4	0.4%
25	Spain	4	0.4%
26	Mauritius	3	0.3%
27	Peru	3	0.3%
28	Serbia	3	0.3%
29	Greece	3	0.3%
30	Indonesia	3	0.3%
31	Argentina	3	0.3%
32	Ghana	2	0.2%
33	South Africa	2	0.2%
34	New Zealand	2	0.2%
35	Iraq	2	0.2%
36	Taiwan	2	0.2%
37	Ukraine	2	0.2%
38	Thailand	1	0.1%
39	Switzerland	1	0.1%
40	Nigeria	1	0.1%
41	Portugal	1	0.1%
42	Albania	1	0.1%
43	Barbados	1	0.1%
44	Egypt	1	0.1%
45	Estonia	1	0.1%