Rank	Countries/Territories	Count	Percent
1	United States	573	42.8%
2	China	453	33.8%
3	Germany	153	11.4%
4	France	48	3.6%
5	Japan	21	1.6%
6	Canada	10	0.7%
7	Argentina	8	0.6%
8	Netherlands	8	0.6%
9	Cyprus	7	0.5%
10	Ukraine	6	0.4%
11	Slovenia	6	0.4%
12	India	5	0.4%
13	Iran, Islamic Republic of	5	0.4%
14	Latvia	4	0.3%
15	Australia	4	0.3%
16	Hong Kong	4	0.3%
17	Singapore	4	0.3%
18	Thailand	3	0.2%
19	United Kingdom	3	0.2%
20	Hungary	2	0.1%
21	Bangladesh	2	0.1%
22	Ireland	2	0.1%
23	Norway	2	0.1%
24	Russia	2	0.1%
25	New Zealand	1	0.1%
26	Mongolia	1	0.1%
27	Spain	1	0.1%
28	Switzerland	1	0.1%