Rank	Countries/Territories	Count	Percent
1	United States	509	45.1%
2	China	258	22.9%
3	Germany	75	6.6%
4	India	56	5%
5	Korea, Republic of	35	3.1%
6	Netherlands	22	1.9%
7	United Kingdom	21	1.9%
8	Japan	19	1.7%
9	Canada	15	1.3%
10	Egypt	10	0.9%
11	Mongolia	10	0.9%
12	Russia	9	0.8%
13	Singapore	9	0.8%
14	Nigeria	6	0.5%
15	Cyprus	6	0.5%
16	Indonesia	6	0.5%
17	Iran, Islamic Republic of	5	0.4%
18	Ireland	5	0.4%
19	Romania	5	0.4%
20	Pakistan	4	0.4%
21	Hong Kong	4	0.4%
22	Australia	4	0.4%
23	France	4	0.4%
24	Morocco	3	0.3%
25	Thailand	3	0.3%
26	Tunisia	2	0.2%
27	Turkey	2	0.2%
28	Sweden	2	0.2%
29	Taiwan	2	0.2%
30	Nepal	2	0.2%
31	Italy	2	0.2%
32	Malaysia	2	0.2%
33	Kuwait	2	0.2%
34	Latvia	1	0.1%
35	Lithuania	1	0.1%
36	Israel	1	0.1%
37	Greece	1	0.1%
38	Mexico	1	0.1%
39	Norway	1	0.1%
40	Portugal	1	0.1%
41	Spain	1	0.1%
42	Serbia	1	0.1%
43	Tanzania, United Republic of	1	0.1%