Rank	Countries/Territories	Count	Percent
1	United States	515	51.1%
2	China	203	20.1%
3	Germany	122	12.1%
4	Japan	39	3.9%
5	Singapore	18	1.8%
6	Canada	16	1.6%
7	South Africa	14	1.4%
8	Korea, Republic of	10	1%
9	Russia	9	0.9%
10	Cyprus	8	0.8%
11		7	0.7%
12	Taiwan	5	0.5%
13	India	4	0.4%
14	Greece	3	0.3%
15	Hong Kong	3	0.3%
16	France	3	0.3%
17	Netherlands	3	0.3%
18	Viet Nam	3	0.3%
19	Uzbekistan	2	0.2%
20	Romania	2	0.2%
21	Iran, Islamic Republic of	2	0.2%
22	Thailand	2	0.2%
23	Ukraine	2	0.2%
24	Egypt	2	0.2%
25	Australia	2	0.2%
26	Latvia	2	0.2%
27	Malaysia	1	0.1%
28	Mongolia	1	0.1%
29	Indonesia	1	0.1%
30	Brazil	1	0.1%
31	Bulgaria	1	0.1%
32	United Kingdom	1	0.1%
33	Switzerland	1	0.1%