Rank	Countries/Territories	Count	Percent
1	United States	576	43.4%
2	China	356	26.8%
3	Germany	148	11.2%
4	Japan	49	3.7%
5	France	35	2.6%
6	Russia	32	2.4%
7	Canada	13	1%
8	Netherlands	11	0.8%
9	United Kingdom	9	0.7%
10	Greece	7	0.5%
11	Bangladesh	6	0.5%
12	Singapore	6	0.5%
13	Italy	6	0.5%
14	Switzerland	5	0.4%
15	Korea, Republic of	5	0.4%
16	Lithuania	5	0.4%
17	Australia	5	0.4%
18	Hong Kong	5	0.4%
19	Ireland	5	0.4%
20	Iran, Islamic Republic of	4	0.3%
21	Luxembourg	4	0.3%
22	Peru	4	0.3%
23	India	3	0.2%
24	Austria	3	0.2%
25	Cyprus	3	0.2%
26	Sweden	3	0.2%
27	Uganda	2	0.2%
28	Chile	2	0.2%
29	Argentina	2	0.2%
30	Israel	2	0.2%
31	Spain	2	0.2%
32	Norway	2	0.2%
33	Mexico	2	0.2%
34	Mongolia	1	0.1%
35	Malaysia	1	0.1%
36	Taiwan	1	0.1%
37	Thailand	1	0.1%
38	Turkey	1	0.1%