Rank	Countries/Territories	Count	Percent
1	United States	494	40.9%
2	China	400	33.1%
3	Germany	113	9.4%
4	Australia	48	4%
5	Japan	36	3%
6	France	29	2.4%
7	Netherlands	14	1.2%
8	Russia	12	1%
9	Singapore	10	0.8%
10	Canada	10	0.8%
11	India	7	0.6%
12	Bulgaria	4	0.3%
13	United Kingdom	4	0.3%
14	Ukraine	2	0.2%
15	Sweden	2	0.2%
16	Nigeria	2	0.2%
17	Malaysia	2	0.2%
18	Brazil	2	0.2%
19	Ireland	2	0.2%
20	Italy	2	0.2%
21	Hong Kong	2	0.2%
22	Iran, Islamic Republic of	1	0.1%
23	Argentina	1	0.1%
24	Cote D'ivoire	1	0.1%
25	Cyprus	1	0.1%
26	Czech Republic	1	0.1%
27	Mexico	1	0.1%
28	Mongolia	1	0.1%
29	Norway	1	0.1%
30	New Zealand	1	0.1%
31	Switzerland	1	0.1%
32	Turkey	1	0.1%