[78-L] two hits - same song

[Joe Scott]

"I wonder at what point in the Billboard charts do we see the rock type 
stuff take decidedly prominent proportion."
Top ten songs of the year per Billboard, approximate number of rock songs (where "rock" includes pop significantly influenced by rock and roll):

1954 1/10
1955 3/10
1956 3/10
1957 3/10
1958 1/10
1959 2/10
1960 3/10
1961 3/10
1962 3/10
1963 3/10
1964 4/10
1965 4/10
1966 4/10
1967 5/10
1968 5/10
1969 5/10
(Of course, most singles were bought by young people.)
Joseph Scott