Rank	Countries/Territories	Count	Percent
1	United States	423	38.2%
2	China	357	32.2%
3	Germany	89	8%
4	Japan	67	6%
5	Ireland	45	4.1%
6	France	27	2.4%
7	Singapore	23	2.1%
8	Canada	14	1.3%
9	Switzerland	12	1.1%
10	Netherlands	7	0.6%
11	Cyprus	7	0.6%
12	Argentina	6	0.5%
13	Australia	5	0.5%
14	United Kingdom	5	0.5%
15	Ukraine	3	0.3%
16	Hong Kong	3	0.3%
17	India	3	0.3%
18	Iran, Islamic Republic of	3	0.3%
19	Bulgaria	2	0.2%
20	Korea, Republic of	2	0.2%
21	Malaysia	2	0.2%
22	Poland	1	0.1%
23	South Africa	1	0.1%
24	Thailand	1	0.1%