Rank	Countries/Territories	Count	Percent
1	United States	312	45.9%
2	China	139	20.5%
3	Germany	92	13.5%
4	India	16	2.4%
5	Estonia	12	1.8%
6	Korea, Republic of	11	1.6%
7	Lithuania	10	1.5%
8		8	1.2%
9	Austria	8	1.2%
10	France	6	0.9%
11	Japan	6	0.9%
12	Singapore	6	0.9%
13	Norway	5	0.7%
14	South Africa	4	0.6%
15	Ethiopia	4	0.6%
16	Hong Kong	4	0.6%
17	Cyprus	4	0.6%
18	Denmark	4	0.6%
19	Sri Lanka	3	0.4%
20	Iran, Islamic Republic of	3	0.4%
21	Netherlands	3	0.4%
22	Romania	2	0.3%
23	Saudi Arabia	2	0.3%
24	Turkey	2	0.3%
25	United Arab Emirates	2	0.3%
26	United Kingdom	2	0.3%
27	Egypt	2	0.3%
28	Canada	2	0.3%
29	Indonesia	1	0.1%
30	Czech Republic	1	0.1%
31	Belgium	1	0.1%
32	Argentina	1	0.1%
33	Taiwan	1	0.1%