Rank	Countries/Territories	Count	Percent
1	United States	477	32.8%
2	China	397	27.3%
3	Germany	154	10.6%
4	India	56	3.9%
5	Switzerland	49	3.4%
6	Japan	41	2.8%
7	Canada	38	2.6%
8	Korea, Republic of	32	2.2%
9	Australia	16	1.1%
10	Israel	14	1%
11	Ireland	12	0.8%
12	Russia	10	0.7%
13	United Kingdom	9	0.6%
14	Netherlands	9	0.6%
15	Egypt	9	0.6%
16	France	9	0.6%
17	Moldova, Republic of	8	0.6%
18	Norway	8	0.6%
19	Singapore	8	0.6%
20	Taiwan	8	0.6%
21	Senegal	7	0.5%
22	Afghanistan	7	0.5%
23	Thailand	6	0.4%
24	Spain	5	0.3%
25	Hong Kong	5	0.3%
26	Italy	4	0.3%
27	Peru	4	0.3%
28	Brazil	4	0.3%
29	Slovakia	4	0.3%
30	Romania	4	0.3%
31	Ukraine	4	0.3%
32	Sweden	3	0.2%
33	Greece	3	0.2%
34	Argentina	3	0.2%
35	Chile	2	0.1%
36	Indonesia	2	0.1%
37	Iraq	2	0.1%
38	Denmark	2	0.1%
39	Qatar	2	0.1%
40	Pakistan	2	0.1%
41	Mongolia	2	0.1%
42	Malaysia	2	0.1%
43	Viet Nam	2	0.1%
44	Turkey	1	0.1%
45	Serbia	1	0.1%
46	Saudi Arabia	1	0.1%
47	Mexico	1	0.1%
48	Nigeria	1	0.1%
49	Georgia	1	0.1%
50	Czech Republic	1	0.1%
51	Belgium	1	0.1%