Rank	Countries/Territories	Count	Percent
1	United States	187	38.4%
2	China	137	28.1%
3	Germany	54	11.1%
4	Singapore	15	3.1%
5	Switzerland	13	2.7%
6	Netherlands	12	2.5%
7		12	2.5%
8	France	11	2.3%
9	Japan	10	2.1%
10	Pakistan	6	1.2%
11	Cyprus	4	0.8%
12	Belgium	3	0.6%
13	India	3	0.6%
14	Iran, Islamic Republic of	2	0.4%
15	Bulgaria	2	0.4%
16	Canada	2	0.4%
17	Australia	2	0.4%
18	Bangladesh	2	0.4%
19	Spain	2	0.4%
20	Taiwan	2	0.4%
21	Ukraine	2	0.4%
22	United Arab Emirates	1	0.2%
23	United Kingdom	1	0.2%
24	Thailand	1	0.2%
25	Iraq	1	0.2%