1936-1940:Crop
Circle appeared in UK as simple circle.
1940-1963:not
many Crop Circles appeared in all over the world.
1966-1977:About
30 simple circle Crop Circles were reported from Australia. (More than
UK at the time.) 1977-1983:
few
Crop Circles were reported in UK, and they were simple circle. 1983-1985:Colin
Andrews started to investigate Crop Circles in UK. 1984-1986:
About
10 Crop Circles each year in UK, but they were simple circle.
1987-1989:
More
than 50 Crop Circles each year, and shape changed complex from simple.