Rank	Countries/Territories	Count	Percent
1	United States	348	40.7%
2	China	290	33.9%
3	Germany	86	10.1%
4	Singapore	20	2.3%
5	Japan	12	1.4%
6	India	11	1.3%
7	France	11	1.3%
8	Netherlands	9	1.1%
9	Norway	9	1.1%
10	Korea, Republic of	6	0.7%
11	Romania	5	0.6%
12	Slovakia	4	0.5%
13	Ireland	4	0.5%
14	Canada	4	0.5%
15	Cyprus	4	0.5%
16	Hong Kong	3	0.4%
17	Viet Nam	3	0.4%
18	Switzerland	3	0.4%
19	Ukraine	3	0.4%
20	United Kingdom	3	0.4%
21	Taiwan	2	0.2%
22	Spain	2	0.2%
23	Sweden	2	0.2%
24	Pakistan	2	0.2%
25	Iran, Islamic Republic of	2	0.2%
26	Denmark	2	0.2%
27	Egypt	1	0.1%
28	Argentina	1	0.1%
29	Austria	1	0.1%
30	Indonesia	1	0.1%
31	Nigeria	1	0.1%