Rank	Countries/Territories	Count	Percent
1	United States	286	40.3%
2	China	230	32.4%
3	Germany	52	7.3%
4	Spain	19	2.7%
5	Singapore	15	2.1%
6	Egypt	12	1.7%
7	Japan	10	1.4%
8	Lithuania	8	1.1%
9	Romania	7	1%
10	Taiwan	7	1%
11	United Kingdom	7	1%
12	Viet Nam	6	0.8%
13	Netherlands	5	0.7%
14	Australia	5	0.7%
15	Canada	5	0.7%
16	Cyprus	4	0.6%
17	Iran, Islamic Republic of	4	0.6%
18	Russia	3	0.4%
19	Saudi Arabia	3	0.4%
20	Qatar	2	0.3%
21	South Africa	2	0.3%
22	Sweden	2	0.3%
23	United Arab Emirates	2	0.3%
24	Ireland	2	0.3%
25	Italy	2	0.3%
26	Korea, Republic of	2	0.3%
27	France	2	0.3%
28	Argentina	2	0.3%
29	Brazil	1	0.1%
30	Bulgaria	1	0.1%
31	Luxembourg	1	0.1%