Rank	Countries/Territories	Count	Percent
1	United States	327	32.3%
2	China	196	19.3%
3	Germany	75	7.4%
4	India	39	3.8%
5	United Kingdom	38	3.8%
6	Kazakhstan	23	2.3%
7	Denmark	23	2.3%
8	France	22	2.2%
9	Taiwan	20	2%
10	Netherlands	18	1.8%
11	Ireland	17	1.7%
12	Canada	17	1.7%
13	Turkey	16	1.6%
14	Australia	15	1.5%
15	Russia	13	1.3%
16	Singapore	13	1.3%
17	Japan	11	1.1%
18	Romania	10	1%
19	Spain	9	0.9%
20	Ukraine	8	0.8%
21	Korea, Republic of	8	0.8%
22	Belgium	8	0.8%
23	Iran, Islamic Republic of	7	0.7%
24	Indonesia	6	0.6%
25	Brazil	5	0.5%
26	Greece	5	0.5%
27	Poland	5	0.5%
28	Morocco	4	0.4%
29	Saudi Arabia	4	0.4%
30	Hungary	4	0.4%
31	Egypt	4	0.4%
32	Lithuania	4	0.4%
33	Mexico	4	0.4%
34	Jordan	3	0.3%
35	Czech Republic	3	0.3%
36	Hong Kong	3	0.3%
37	Tanzania, United Republic of	3	0.3%
38	Viet Nam	3	0.3%
39	Ghana	2	0.2%
40	Ecuador	2	0.2%
41	Italy	2	0.2%
42	Malaysia	2	0.2%
43	Mauritania	2	0.2%
44	New Zealand	2	0.2%
45	Oman	1	0.1%
46	Pakistan	1	0.1%
47	Mongolia	1	0.1%
48	Latvia	1	0.1%
49	Cyprus	1	0.1%
50	Angola	1	0.1%
51	Thailand	1	0.1%
52	Syrian Arab Republic	1	0.1%