Rank	Countries/Territories	Count	Percent
1	United States	491	37.2%
2	China	340	25.8%
3	Japan	176	13.3%
4	Germany	84	6.4%
5	Korea, Republic of	70	5.3%
6	Netherlands	31	2.4%
7	Singapore	28	2.1%
8	United Kingdom	9	0.7%
9	Canada	8	0.6%
10	Hong Kong	6	0.5%
11	Cyprus	6	0.5%
12	Argentina	5	0.4%
13	Ireland	5	0.4%
14	Russia	5	0.4%
15	Taiwan	5	0.4%
16	Poland	4	0.3%
17	Latvia	4	0.3%
18	India	3	0.2%
19	Australia	3	0.2%
20	Bangladesh	3	0.2%
21	Spain	3	0.2%
22	Tanzania, United Republic of	2	0.2%
23	Brazil	2	0.2%
24	Ecuador	2	0.2%
25	France	2	0.2%
26	Italy	2	0.2%
27	Greece	2	0.2%
28	Nepal	2	0.2%
29	Mexico	2	0.2%
30	Mongolia	2	0.2%
31	Pakistan	2	0.2%
32	Slovakia	2	0.2%
33	Portugal	1	0.1%
34	Norway	1	0.1%
35	Morocco	1	0.1%
36	Lithuania	1	0.1%
37	Colombia	1	0.1%
38	Iran, Islamic Republic of	1	0.1%
39	Georgia	1	0.1%
40	Viet Nam	1	0.1%