Rank	Countries/Territories	Count	Percent
1	United States	219	41.2%
2	China	128	24.1%
3	Germany	80	15.1%
4	Russia	30	5.6%
5	France	18	3.4%
6	Japan	10	1.9%
7	Singapore	8	1.5%
8	Netherlands	6	1.1%
9	Ireland	4	0.8%
10	Australia	4	0.8%
11	India	3	0.6%
12	Ukraine	3	0.6%
13	United Kingdom	3	0.6%
14	Iran, Islamic Republic of	2	0.4%
15	Israel	2	0.4%
16	Canada	2	0.4%
17	Norway	2	0.4%
18	Malaysia	2	0.4%
19	Spain	2	0.4%
20	South Africa	1	0.2%
21	Mongolia	1	0.2%
22	Cyprus	1	0.2%