Rank	Countries/Territories	Count	Percent
1	United States	406	51.3%
2	China	126	15.9%
3	Germany	66	8.3%
4	India	37	4.7%
5	France	35	4.4%
6	Russia	32	4%
7	Korea, Republic of	30	3.8%
8	Canada	10	1.3%
9	Singapore	8	1%
10	Cyprus	6	0.8%
11	Netherlands	5	0.6%
12	Japan	5	0.6%
13	Ireland	4	0.5%
14	Australia	4	0.5%
15	Bulgaria	4	0.5%
16	Argentina	2	0.3%
17	Iran, Islamic Republic of	2	0.3%
18	Mongolia	2	0.3%
19	Turkey	2	0.3%
20	Ukraine	1	0.1%
21	Norway	1	0.1%
22	Philippines	1	0.1%
23	Portugal	1	0.1%
24	Greece	1	0.1%
25	Hungary	1	0.1%