Rank	Countries/Territories	Count	Percent
1	United States	318	46.5%
2	China	137	20%
3	Germany	45	6.6%
4	Canada	30	4.4%
5	United Kingdom	21	3.1%
6	Japan	15	2.2%
7	Australia	14	2%
8	India	12	1.8%
9	Singapore	12	1.8%
10	France	12	1.8%
11	Russia	8	1.2%
12	Korea, Republic of	7	1%
13	Netherlands	6	0.9%
14	Spain	5	0.7%
15	Argentina	5	0.7%
16	Ireland	3	0.4%
17	Malta	3	0.4%
18	Malaysia	2	0.3%
19	Norway	2	0.3%
20	Pakistan	2	0.3%
21	Philippines	2	0.3%
22	Ukraine	2	0.3%
23	Morocco	2	0.3%
24	South Africa	2	0.3%
25	Italy	2	0.3%
26	Iran, Islamic Republic of	2	0.3%
27	Hong Kong	2	0.3%
28	Cyprus	1	0.1%
29	Czech Republic	1	0.1%
30	Belgium	1	0.1%
31	Brazil	1	0.1%
32	Lao People's Democratic Republic	1	0.1%
33	Lebanon	1	0.1%
34	Libya	1	0.1%
35	Lithuania	1	0.1%
36	Viet Nam	1	0.1%
37	Zimbabwe	1	0.1%
38	Mauritius	1	0.1%