Rank	Countries/Territories	Count	Percent
1	United States	540	43.8%
2	China	287	23.3%
3	Germany	106	8.6%
4	Romania	66	5.3%
5	Japan	39	3.2%
6	Canada	35	2.8%
7	India	21	1.7%
8	Netherlands	19	1.5%
9	Spain	19	1.5%
10	Korea, Republic of	14	1.1%
11	United Kingdom	13	1.1%
12	Czech Republic	9	0.7%
13	Cyprus	6	0.5%
14	Malaysia	6	0.5%
15	Italy	6	0.5%
16	Taiwan	5	0.4%
17	Singapore	5	0.4%
18	Argentina	4	0.3%
19	Ireland	4	0.3%
20	Hong Kong	3	0.2%
21		3	0.2%
22	Australia	2	0.2%
23	Bangladesh	2	0.2%
24	Hungary	2	0.2%
25	Iran, Islamic Republic of	2	0.2%
26	Pakistan	2	0.2%
27	France	2	0.2%
28	Jordan	2	0.2%
29	Nigeria	2	0.2%
30	Norway	1	0.1%
31	Mongolia	1	0.1%
32	Ukraine	1	0.1%
33	Switzerland	1	0.1%
34	Israel	1	0.1%
35	Denmark	1	0.1%
36	Belgium	1	0.1%
37	Brazil	1	0.1%