The unforgettable decade, The 70's

According to Billboard, there're more than 5.300 hit singles charted in the period 1970-1979. 1970 was the most productive year with 635 hits and 1978 was the littlest with 451 singles. Here are the complete list:

1970 - 635 hits
1971 - 620 hits
1972 - 584 hits
1973 - 531 hits
1974 - 492 hits
1975 - 560 hits
1976 - 527 hits
1977 - 469 hits
1978 - 451 hits
1979 - 475 hits

Total : 5.344 hits.