Rank	Countries/Territories	Count	Percent
1	United States	428	38.7%
2	China	411	37.1%
3	Germany	88	7.9%
4	Canada	31	2.8%
5	Japan	23	2.1%
6	France	21	1.9%
7	Netherlands	15	1.4%
8	India	13	1.2%
9	Singapore	12	1.1%
10	Brazil	8	0.7%
11	Hong Kong	7	0.6%
12	Korea, Republic of	6	0.5%
13	Switzerland	5	0.5%
14	Italy	5	0.5%
15	Indonesia	5	0.5%
16	Argentina	5	0.5%
17	Colombia	3	0.3%
18	Mexico	3	0.3%
19	Tanzania, United Republic of	3	0.3%
20	Kazakhstan	3	0.3%
21	Taiwan	2	0.2%
22	Cyprus	2	0.2%
23	Australia	2	0.2%
24	Iran, Islamic Republic of	2	0.2%
25	Ireland	1	0.1%
26	Georgia	1	0.1%
27	Egypt	1	0.1%
28	Malaysia	1	0.1%