Rank	Countries/Territories	Count	Percent
1	United States	420	44.7%
2	China	259	27.6%
3	Germany	111	11.8%
4	Japan	31	3.3%
5	Netherlands	17	1.8%
6	Singapore	16	1.7%
7	Australia	12	1.3%
8	Korea, Republic of	9	1%
9	France	8	0.9%
10	Ireland	7	0.7%
11	Cyprus	7	0.7%
12	Argentina	5	0.5%
13	Belgium	4	0.4%
14	Taiwan	4	0.4%
15	Romania	3	0.3%
16	Canada	3	0.3%
17	Iran, Islamic Republic of	3	0.3%
18	Israel	2	0.2%
19	Norway	2	0.2%
20	Saudi Arabia	2	0.2%
21	United Kingdom	2	0.2%
22	Morocco	2	0.2%
23	Syrian Arab Republic	2	0.2%
24	Viet Nam	1	0.1%
25	Serbia	1	0.1%
26	Sweden	1	0.1%
27	Switzerland	1	0.1%
28	Russia	1	0.1%
29	Lithuania	1	0.1%
30	Hong Kong	1	0.1%
31		1	0.1%
32	Austria	1	0.1%