This list is based on the evaluation of Billboard magazine, appeared for the first time on August 4, 1958 and is published weekly. This is a ranking is calculated (for the songs or singles), combining the number of maximum consumption (number of sales) and the amount to be broadcast on the mass media, before 1958 was calculated according to the number of times the song from the gramophone enabled Jukebox placed in public places like restaurants, the station .... These calculations, the criteria for the ranking of the songs have changed over time and corresponds to the change of the market. In the US, the album has many songs or albums, each song is listed separately, because although the overall sales numbers, but vary in length and number is broadcast in the media mass media (radio, TV ...), this listing does not like the example in the charts in the UK and Germany.
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