Rank	Countries/Territories	Count	Percent
1	United States	520	47.2%
2	China	310	28.2%
3	Germany	125	11.4%
4	France	28	2.5%
5	Japan	26	2.4%
6	Netherlands	13	1.2%
7	Ukraine	13	1.2%
8	Singapore	9	0.8%
9	Australia	7	0.6%
10	Ireland	6	0.5%
11	Cyprus	5	0.5%
12	Italy	4	0.4%
13	United Kingdom	4	0.4%
14	Taiwan	4	0.4%
15	India	3	0.3%
16	Iran, Islamic Republic of	2	0.2%
17	Malaysia	2	0.2%
18	Denmark	2	0.2%
19	Estonia	2	0.2%
20	Argentina	2	0.2%
21	Greece	2	0.2%
22	Hong Kong	2	0.2%
23	Uganda	2	0.2%
24	Slovakia	2	0.2%
25	Norway	2	0.2%
26	Portugal	1	0.1%
27	Sweden	1	0.1%
28	Mongolia	1	0.1%
29	Indonesia	1	0.1%