Rank	Countries/Territories	Count	Percent
1	United States	429	41.3%
2	China	260	25%
3	Germany	57	5.5%
4	Japan	44	4.2%
5	Romania	37	3.6%
6	United Kingdom	24	2.3%
7	Singapore	19	1.8%
8	Norway	19	1.8%
9	France	19	1.8%
10	Belgium	19	1.8%
11	Canada	15	1.4%
12	Netherlands	13	1.3%
13	South Africa	12	1.2%
14	Ireland	10	1%
15	Cyprus	7	0.7%
16	Hungary	7	0.7%
17	Iran, Islamic Republic of	6	0.6%
18	Turkey	5	0.5%
19	Taiwan	4	0.4%
20	Egypt	4	0.4%
21	Hong Kong	3	0.3%
22	Australia	3	0.3%
23	Bulgaria	3	0.3%
24	Ukraine	3	0.3%
25	Tunisia	2	0.2%
26	Slovenia	2	0.2%
27	Mauritius	2	0.2%
28	Philippines	2	0.2%
29	Austria	2	0.2%
30	Brazil	2	0.2%
31	Argentina	1	0.1%
32	Colombia	1	0.1%
33	Russia	1	0.1%
34	Korea, Republic of	1	0.1%
35	Lithuania	1	0.1%