These are the Billboard end-of-year charts from 1950 - 2020. Each file has chart position, artist, and song title. The data from 1950 - 2015 was scraped from Bobborst.com by Kevin Schaich, originally from Billboard.
Years after 2015 were scraped directly from Billboard by Justin Allen and added.
NOTE: for 1950-1955, there are only the top 30 songs on that site.