Rank	Countries/Territories	Count	Percent
1	United States	138	37.1%
2	China	82	22%
3	Germany	45	12.1%
4	Japan	18	4.8%
5	Russia	18	4.8%
6	India	14	3.8%
7	Canada	10	2.7%
8	Singapore	9	2.4%
9	Netherlands	6	1.6%
10	Korea, Republic of	5	1.3%
11	Portugal	4	1.1%
12	Cyprus	3	0.8%
13	Iran, Islamic Republic of	3	0.8%
14	Ireland	2	0.5%
15	Italy	2	0.5%
16	France	2	0.5%
17	Australia	2	0.5%
18	Luxembourg	2	0.5%
19	Norway	2	0.5%
20	Taiwan	2	0.5%
21	Ukraine	1	0.3%
22	Switzerland	1	0.3%
23	Greece	1	0.3%