Rank	Countries/Territories	Count	Percent
1	United States	251	45.6%
2	China	116	21.1%
3	Germany	48	8.7%
4	Canada	15	2.7%
5	Switzerland	14	2.5%
6	Russia	13	2.4%
7	Singapore	11	2%
8	Japan	9	1.6%
9	Korea, Republic of	9	1.6%
10	Cyprus	7	1.3%
11	France	6	1.1%
12	Netherlands	6	1.1%
13	Indonesia	6	1.1%
14	Iran, Islamic Republic of	6	1.1%
15	United Kingdom	4	0.7%
16	Poland	4	0.7%
17	Ireland	3	0.5%
18	Hong Kong	3	0.5%
19	India	2	0.4%
20	Philippines	2	0.4%
21	Mexico	2	0.4%
22	Australia	2	0.4%
23	Bangladesh	2	0.4%
24	Belgium	2	0.4%
25	Romania	2	0.4%
26	Saudi Arabia	2	0.4%
27	Taiwan	1	0.2%
28	Austria	1	0.2%
29	Argentina	1	0.2%