This is the spreadsheet for all the spawning data in the base mod: https://docs.google.com/spreadsheets/d/16JrrEp919HVn8YE0AtmeAu6_tPkMkKqEmRzMlKW442A/edit?gid=0#gid=0
See here for a companion page for the biome categories listed in the spreadsheet.
See here for more information on presets listed in the spreadsheet.