Rank	Countries/Territories	Count	Percent
1	United States	543	43.5%
2	China	328	26.3%
3	Germany	106	8.5%
4	France	58	4.6%
5	Denmark	47	3.8%
6	Korea, Republic of	37	3%
7	Russia	12	1%
8	Singapore	11	0.9%
9	Canada	11	0.9%
10	Japan	10	0.8%
11	Cyprus	9	0.7%
12	Argentina	9	0.7%
13	India	8	0.6%
14	Netherlands	8	0.6%
15	United Kingdom	7	0.6%
16	Ireland	7	0.6%
17	Iran, Islamic Republic of	5	0.4%
18	Egypt	5	0.4%
19	Ukraine	4	0.3%
20	South Africa	4	0.3%
21	Palestine, State of	3	0.2%
22	Spain	2	0.2%
23	Mongolia	2	0.2%
24	Israel	2	0.2%
25	Australia	2	0.2%
26	Bangladesh	2	0.2%
27	Brazil	1	0.1%
28	Ecuador	1	0.1%
29	Hong Kong	1	0.1%
30	Switzerland	1	0.1%
31	Taiwan	1	0.1%
32	Romania	1	0.1%