Rank	Countries/Territories	Count	Percent
1	United States	443	41.8%
2	China	357	33.7%
3	Germany	124	11.7%
4	Japan	23	2.2%
5	France	12	1.1%
6	Canada	12	1.1%
7	India	11	1%
8	United Kingdom	10	0.9%
9	Singapore	7	0.7%
10	Norway	7	0.7%
11	Australia	6	0.6%
12	Russia	5	0.5%
13	Netherlands	5	0.5%
14	Latvia	3	0.3%
15	Ukraine	3	0.3%
16	Cyprus	3	0.3%
17	Hong Kong	3	0.3%
18	Iran, Islamic Republic of	2	0.2%
19	Ireland	2	0.2%
20	Italy	2	0.2%
21	Bangladesh	2	0.2%
22	Chile	2	0.2%
23	Viet Nam	2	0.2%
24	Spain	2	0.2%
25	Taiwan	2	0.2%
26	Turkey	2	0.2%
27	Mongolia	2	0.2%
28	Malaysia	1	0.1%
29	Korea, Republic of	1	0.1%
30	Yemen	1	0.1%
31	Czech Republic	1	0.1%
32	Colombia	1	0.1%
33	Argentina	1	0.1%