radio relay and high-frequency radio communication stations in

2.228368 0.448759 7.2813% 1977 1.515764 0.659733 6.6558% 1976 0.380561 2.627696 6.4073% 1975 8.013451 0.124790 9.8159% 1974 0.380997 2.624691 9.0909% 1973 0.226865 4.407915 6.4509% 1972 6.940664 0.144078 4.7304% 1971 1.115561 0.896410

wending