Rank	Countries/Territories	Count	Percent
1	United States	560	42.9%
2	China	334	25.6%
3	Germany	203	15.5%
4	France	28	2.1%
5	Canada	27	2.1%
6	Bulgaria	23	1.8%
7	Korea, Republic of	23	1.8%
8	Netherlands	22	1.7%
9	Japan	14	1.1%
10	Nigeria	10	0.8%
11	Turkey	7	0.5%
12	Singapore	6	0.5%
13	Russia	5	0.4%
14	Ireland	5	0.4%
15	Argentina	4	0.3%
16	India	3	0.2%
17	United Kingdom	3	0.2%
18	Switzerland	2	0.2%
19	South Africa	2	0.2%
20	Mongolia	2	0.2%
21	Philippines	2	0.2%
22	Poland	2	0.2%
23	Portugal	2	0.2%
24	Iran, Islamic Republic of	2	0.2%
25	Latvia	2	0.2%
26	Lithuania	2	0.2%
27	Cyprus	2	0.2%
28	Hong Kong	2	0.2%
29	Cote D'ivoire	1	0.1%
30	Mauritius	1	0.1%
31	Moldova, Republic of	1	0.1%
32	Romania	1	0.1%
33	Sweden	1	0.1%
34	Taiwan	1	0.1%
35	Thailand	1	0.1%