@ianlandsman @dabernathy89 @wilburpowery @joecampo @tillkruss The last time I guessed (in 2016) I estimated $39 million per year.

(I could be way off)

My sources are included here:
https://docs.google.com/spreadsheets/d/1RwrDxt1KwAB_MSoHN79adVhVXanHeMXZ2UvWIos_-oM/edit?usp=sharing