Box office data available for analysis?

I am looking into some analysis of movie/series data and have used these data sets until now: https://datasets.imdbws.com/

However, I cannot find any information about Box office data in these datasets. I got IMDbPro to see if there would be any access there, but could not find anything to download. Does anyone have an idea where I can find a dataset related to the movies and series available on IMDb?