Rank	Countries/Territories	Count	Percent
1	United States	411	33.5%
2	China	294	23.9%
3	Germany	225	18.3%
4	India	68	5.5%
5	Singapore	60	4.9%
6	Italy	17	1.4%
7	Bulgaria	17	1.4%
8	Ireland	16	1.3%
9	Brazil	15	1.2%
10	France	12	1%
11	Korea, Republic of	12	1%
12	Japan	7	0.6%
13	Russia	7	0.6%
14	Canada	7	0.6%
15	Turkey	6	0.5%
16	Australia	5	0.4%
17	Israel	5	0.4%
18	Ukraine	4	0.3%
19	United Kingdom	4	0.3%
20	Spain	4	0.3%
21	Taiwan	4	0.3%
22	Indonesia	3	0.2%
23	Hong Kong	3	0.2%
24	Bangladesh	3	0.2%
25	Colombia	3	0.2%
26	Ecuador	2	0.2%
27	Belgium	2	0.2%
28	Hungary	2	0.2%
29	Mongolia	2	0.2%
30	Romania	1	0.1%
31	South Africa	1	0.1%
32	Mexico	1	0.1%
33	Viet Nam	1	0.1%
34	Iran, Islamic Republic of	1	0.1%
35	Egypt	1	0.1%
36	Finland	1	0.1%
37	Denmark	1	0.1%