Rank	Countries/Territories	Count	Percent
1	United States	157	27.3%
2	China	142	24.7%
3	Germany	49	8.5%
4	United Kingdom	43	7.5%
5	Japan	23	4%
6	Romania	20	3.5%
7	Pakistan	13	2.3%
8	Switzerland	11	1.9%
9	Hong Kong	9	1.6%
10	France	9	1.6%
11	India	8	1.4%
12	Singapore	8	1.4%
13	Spain	7	1.2%
14	Viet Nam	7	1.2%
15	Italy	6	1%
16	Netherlands	6	1%
17	Australia	6	1%
18	Taiwan	5	0.9%
19	Portugal	5	0.9%
20	Turkey	4	0.7%
21	Brazil	4	0.7%
22	Iran, Islamic Republic of	4	0.7%
23	Ghana	4	0.7%
24	Colombia	3	0.5%
25	Ecuador	3	0.5%
26	Egypt	3	0.5%
27	Philippines	3	0.5%
28	Qatar	2	0.3%
29	Argentina	2	0.3%
30	Korea, Republic of	2	0.3%
31	Malaysia	1	0.2%
32	Norway	1	0.2%
33	Greece	1	0.2%
34	Cyprus	1	0.2%
35	Canada	1	0.2%
36	Sweden	1	0.2%
37	South Africa	1	0.2%