Rank	Countries/Territories	Count	Percent
1	United States	549	44.9%
2	China	252	20.6%
3	Germany	233	19.1%
4	Canada	30	2.5%
5	Japan	27	2.2%
6	Ireland	20	1.6%
7	Netherlands	16	1.3%
8	France	14	1.1%
9	Australia	13	1.1%
10	Cyprus	7	0.6%
11	India	7	0.6%
12	Ukraine	6	0.5%
13	Norway	6	0.5%
14	Korea, Republic of	5	0.4%
15	Argentina	3	0.2%
16	Portugal	3	0.2%
17	Russia	3	0.2%
18	Singapore	3	0.2%
19	Slovenia	3	0.2%
20	Spain	3	0.2%
21	Sri Lanka	2	0.2%
22	Mongolia	2	0.2%
23	Brazil	2	0.2%
24	Egypt	2	0.2%
25	Ethiopia	2	0.2%
26	Israel	2	0.2%
27	Malaysia	1	0.1%
28	Iran, Islamic Republic of	1	0.1%
29	Hong Kong	1	0.1%
30	Finland	1	0.1%
31	Bulgaria	1	0.1%
32	United Kingdom	1	0.1%
33	Romania	1	0.1%