Rank	Countries/Territories	Count	Percent
1	United States	422	33.8%
2	China	408	32.6%
3	Germany	98	7.8%
4	Russia	51	4.1%
5	Japan	48	3.8%
6	Korea, Republic of	30	2.4%
7	Singapore	20	1.6%
8	United Kingdom	19	1.5%
9	France	18	1.4%
10	Sweden	14	1.1%
11	Netherlands	14	1.1%
12	Nigeria	10	0.8%
13	Bulgaria	10	0.8%
14	Turkey	9	0.7%
15	Latvia	7	0.6%
16	Switzerland	7	0.6%
17	Benin	6	0.5%
18	Canada	5	0.4%
19	Argentina	4	0.3%
20	Cyprus	4	0.3%
21	Ukraine	4	0.3%
22	Cote D'ivoire	3	0.2%
23	Australia	3	0.2%
24	Iran, Islamic Republic of	3	0.2%
25	Israel	3	0.2%
26	Lithuania	3	0.2%
27	Mauritius	3	0.2%
28	Philippines	2	0.2%
29	Romania	2	0.2%
30	Kenya	2	0.2%
31	Taiwan	2	0.2%
32	Ireland	2	0.2%
33	Indonesia	2	0.2%
34	Chile	2	0.2%
35	Viet Nam	2	0.2%
36	Belgium	1	0.1%
37	Greece	1	0.1%
38	Hong Kong	1	0.1%
39	India	1	0.1%
40	Thailand	1	0.1%
41	Poland	1	0.1%
42	Mongolia	1	0.1%
43	Myanmar	1	0.1%