Rank	Countries/Territories	Count	Percent
1	United States	253	39.3%
2	China	117	18.2%
3	Germany	79	12.3%
4	Canada	63	9.8%
5	France	18	2.8%
6	Australia	12	1.9%
7	Singapore	10	1.6%
8	Switzerland	10	1.6%
9	Netherlands	7	1.1%
10	Korea, Republic of	7	1.1%
11	Romania	6	0.9%
12	Hong Kong	6	0.9%
13	India	5	0.8%
14	Turkey	5	0.8%
15	Slovakia	4	0.6%
16	Oman	4	0.6%
17	Cyprus	4	0.6%
18	Czech Republic	3	0.5%
19	Ireland	3	0.5%
20	Poland	3	0.5%
21	United Kingdom	3	0.5%
22	Ukraine	2	0.3%
23	Latvia	2	0.3%
24	Malaysia	2	0.3%
25	Norway	2	0.3%
26	Iran, Islamic Republic of	2	0.3%
27	Denmark	2	0.3%
28	Bulgaria	2	0.3%
29	Argentina	1	0.2%
30	Bangladesh	1	0.2%
31	Belgium	1	0.2%
32	Israel	1	0.2%
33	Japan	1	0.2%
34	Jordan	1	0.2%
35	Mongolia	1	0.2%
36	Nepal	1	0.2%