Total play count of songs over time (monthly)

[endevvor]

I am attempting to conduct a research project which requires accessing the stream data/play count of any specific song over time. So far, I've found third-party APIs which offer this data (sites such as soundcharts.com) but only for very recent dates. Would anyone know where they are sourcing their data from, or if this data can be gathered using the official Spotify API? I've combed through the Spotify API references page for clues, but I've come up short. 

Any help would be appreciated!