Rank	Countries/Territories	Count	Percent
1	United States	345	35.5%
2	China	308	31.7%
3	Germany	120	12.3%
4		41	4.2%
5	Russia	21	2.2%
6	France	17	1.7%
7	Japan	17	1.7%
8	Netherlands	15	1.5%
9	Singapore	14	1.4%
10	Canada	8	0.8%
11	Korea, Republic of	6	0.6%
12	Australia	6	0.6%
13	Syrian Arab Republic	6	0.6%
14	Iran, Islamic Republic of	6	0.6%
15	Ukraine	6	0.6%
16	Argentina	5	0.5%
17	Hong Kong	5	0.5%
18	Cyprus	4	0.4%
19	United Kingdom	4	0.4%
20	Taiwan	4	0.4%
21	South Africa	2	0.2%
22	Belgium	2	0.2%
23	Bulgaria	2	0.2%
24	Malaysia	2	0.2%
25	India	1	0.1%
26	Ghana	1	0.1%
27	Ethiopia	1	0.1%
28	Austria	1	0.1%
29	Sweden	1	0.1%
30	Poland	1	0.1%