Rank	Countries/Territories	Count	Percent
1	United States	340	34.2%
2	China	229	23%
3	Japan	219	22%
4	Germany	74	7.4%
5	Singapore	41	4.1%
6	France	14	1.4%
7	Switzerland	13	1.3%
8	Russia	9	0.9%
9	Netherlands	8	0.8%
10	Korea, Republic of	6	0.6%
11	Argentina	4	0.4%
12	United Kingdom	4	0.4%
13	Ireland	3	0.3%
14	Taiwan	3	0.3%
15	Spain	3	0.3%
16	Cyprus	3	0.3%
17	Hong Kong	3	0.3%
18	Iran, Islamic Republic of	2	0.2%
19	Australia	2	0.2%
20	Bulgaria	2	0.2%
21	Thailand	2	0.2%
22	New Zealand	1	0.1%
23	Uzbekistan	1	0.1%
24	Viet Nam	1	0.1%
25	Canada	1	0.1%
26	Brazil	1	0.1%
27	Egypt	1	0.1%
28	Colombia	1	0.1%
29	Iraq	1	0.1%
30	Malaysia	1	0.1%
31	India	1	0.1%
32	Georgia	1	0.1%