Rank	Countries/Territories	Count	Percent
1	United States	292	32.6%
2	China	214	23.9%
3	Japan	214	23.9%
4	Germany	57	6.4%
5	Singapore	41	4.6%
6	France	14	1.6%
7	Switzerland	13	1.5%
8	Netherlands	8	0.9%
9	Korea, Republic of	6	0.7%
10	Argentina	4	0.4%
11	United Kingdom	4	0.4%
12	Ireland	3	0.3%
13	Taiwan	2	0.2%
14	Thailand	2	0.2%
15	Bulgaria	2	0.2%
16	Cyprus	2	0.2%
17	Iran, Islamic Republic of	2	0.2%
18	Hong Kong	2	0.2%
19	India	1	0.1%
20	Georgia	1	0.1%
21	Iraq	1	0.1%
22	Malaysia	1	0.1%
23	Egypt	1	0.1%
24	Colombia	1	0.1%
25	Canada	1	0.1%
26	Australia	1	0.1%
27	Brazil	1	0.1%
28	New Zealand	1	0.1%
29	Spain	1	0.1%
30	Uzbekistan	1	0.1%
31	Viet Nam	1	0.1%