Age of Sail (1700)

Parent universe: Reality

Value: 0.54
Min: 0.5
Max: 0.6
Confidence: CalculatedGuess

There are big ships and cannons, but the majority of the people lives like 2000 years ago: still 300 W. Yet, there are much more people.

Value: 800e6
Min: 600e6
Max: 1e9
Confidence: Canon

References:

Quick Wikipedia research. Error bars guestimated.

Quite modern technology, big ships, metal working, mills, early industrial structures.