Rank	Countries/Territories	Count	Percent
1	United States	613	35.6%
2	China	487	28.3%
3	Germany	206	12%
4	Switzerland	88	5.1%
5	Japan	76	4.4%
6	France	34	2%
7	Singapore	30	1.7%
8	Iran, Islamic Republic of	28	1.6%
9	Turkey	20	1.2%
10	United Kingdom	19	1.1%
11	Canada	18	1%
12	Cyprus	16	0.9%
13	Netherlands	12	0.7%
14	Sweden	12	0.7%
15	Italy	9	0.5%
16	India	9	0.5%
17	Iraq	8	0.5%
18	Korea, Republic of	6	0.3%
19	Australia	4	0.2%
20	Hong Kong	3	0.2%
21	Ireland	2	0.1%
22	Bangladesh	2	0.1%
23	Belgium	2	0.1%
24	Czech Republic	2	0.1%
25	Ethiopia	2	0.1%
26	Taiwan	2	0.1%
27	Russia	2	0.1%
28	South Africa	2	0.1%
29	Spain	2	0.1%
30	Viet Nam	1	0.1%
31	Egypt	1	0.1%
32	Colombia	1	0.1%
33	Mongolia	1	0.1%