Rank	Countries/Territories	Count	Percent
1	United States	577	39.6%
2	China	498	34.2%
3	Germany	126	8.6%
4	Canada	38	2.6%
5	Russia	28	1.9%
6	France	23	1.6%
7	Japan	18	1.2%
8	Netherlands	17	1.2%
9	Singapore	16	1.1%
10	India	14	1%
11	Switzerland	10	0.7%
12	Korea, Republic of	9	0.6%
13	Hong Kong	9	0.6%
14	Italy	8	0.5%
15	Philippines	8	0.5%
16	Cyprus	7	0.5%
17	Australia	6	0.4%
18	Bangladesh	6	0.4%
19	Ireland	6	0.4%
20	Iran, Islamic Republic of	4	0.3%
21	Argentina	4	0.3%
22	Egypt	4	0.3%
23	United Kingdom	4	0.3%
24	Latvia	3	0.2%
25	Mauritius	3	0.2%
26	Taiwan	2	0.1%
27	Brazil	2	0.1%
28	Indonesia	2	0.1%
29	Finland	1	0.1%
30	Turkey	1	0.1%
31	Nepal	1	0.1%
32	Norway	1	0.1%
33	Lithuania	1	0.1%
34	Luxembourg	1	0.1%