Rank	Countries/Territories	Count	Percent
1	United States	520	39.5%
2	China	487	37%
3	Germany	113	8.6%
4	France	33	2.5%
5	Canada	26	2%
6	Japan	23	1.7%
7	Netherlands	19	1.4%
8	Singapore	17	1.3%
9	Hong Kong	17	1.3%
10	Australia	10	0.8%
11	Romania	8	0.6%
12	Pakistan	5	0.4%
13	Tanzania, United Republic of	5	0.4%
14	Norway	4	0.3%
15	Cyprus	4	0.3%
16	Latvia	4	0.3%
17	Brazil	3	0.2%
18	Taiwan	3	0.2%
19	United Kingdom	2	0.2%
20	Portugal	2	0.2%
21	Egypt	2	0.2%
22	India	1	0.1%
23	Malaysia	1	0.1%
24	Mongolia	1	0.1%
25	Korea, Republic of	1	0.1%
26	Colombia	1	0.1%
27	Bangladesh	1	0.1%
28	Algeria	1	0.1%
29	Argentina	1	0.1%
30	Sweden	1	0.1%
31	Switzerland	1	0.1%