Rank	Countries/Territories	Count	Percent
1	United States	443	31.1%
2	China	419	29.4%
3	Germany	130	9.1%
4	India	74	5.2%
5	Russia	68	4.8%
6	Japan	49	3.4%
7	Switzerland	45	3.2%
8	Italy	17	1.2%
9	Korea, Republic of	15	1.1%
10	Israel	14	1%
11	Hong Kong	13	0.9%
12	Australia	12	0.8%
13	Brazil	11	0.8%
14	Ireland	11	0.8%
15	Singapore	11	0.8%
16	Spain	9	0.6%
17	Canada	9	0.6%
18	Romania	7	0.5%
19	Pakistan	7	0.5%
20	Taiwan	7	0.5%
21	Serbia	6	0.4%
22	Egypt	6	0.4%
23	France	6	0.4%
24	Netherlands	5	0.4%
25	United Kingdom	5	0.4%
26	Lithuania	3	0.2%
27	Portugal	3	0.2%
28	Iran, Islamic Republic of	3	0.2%
29	Argentina	2	0.1%
30	Finland	2	0.1%
31	Chile	2	0.1%
32	Belarus	2	0.1%
33	Mongolia	2	0.1%
34	Ukraine	2	0.1%
35	United Arab Emirates	1	0.1%
36	Kazakhstan	1	0.1%
37	New Zealand	1	0.1%
38	Palestine, State of	1	0.1%
39	Slovakia	1	0.1%
40	Colombia	1	0.1%