r/u_munsoso_new_language

Hello everyone,
While looking into the history of international auxiliary languages, I started wondering about the total volume of IAL proposals over time.
From early projects and historical attempts (like Volapük or Esperanto) to modern zonal and global projects:
Is there an accepted historical estimate for how many IALs/auxlangs have been created or published so far?

Which archives or databases best document the history and full list of constructed auxiliary languages?

Thanks in advance for sharing any historical insights or resources!