Rank	Countries/Territories	Count	Percent
1	United States	148	39.3%
2	China	86	22.8%
3	Germany	48	12.7%
4	Russia	13	3.4%
5	Canada	11	2.9%
6	Singapore	11	2.9%
7	Korea, Republic of	9	2.4%
8	Japan	8	2.1%
9	Switzerland	6	1.6%
10	Netherlands	6	1.6%
11	Cyprus	5	1.3%
12	Poland	4	1.1%
13	Ireland	3	0.8%
14	France	3	0.8%
15	Hong Kong	3	0.8%
16	India	2	0.5%
17	Iran, Islamic Republic of	2	0.5%
18	Belgium	2	0.5%
19	Mexico	2	0.5%
20	Saudi Arabia	2	0.5%
21	United Kingdom	2	0.5%
22	Austria	1	0.3%