Rank	Countries/Territories	Count	Percent
1	United States	333	41.6%
2	China	268	33.5%
3	Germany	108	13.5%
4	Japan	15	1.9%
5	Canada	13	1.6%
6	France	10	1.2%
7	Taiwan	9	1.1%
8		7	0.9%
9	Australia	6	0.8%
10	Cyprus	5	0.6%
11	Singapore	5	0.6%
12	Hong Kong	4	0.5%
13	India	4	0.5%
14	Bulgaria	2	0.2%
15	Netherlands	2	0.2%
16	Russia	2	0.2%
17	Ukraine	1	0.1%
18	Norway	1	0.1%
19	Poland	1	0.1%
20	South Africa	1	0.1%
21	Switzerland	1	0.1%
22	Korea, Republic of	1	0.1%
23	Iran, Islamic Republic of	1	0.1%