Imperial Population

The imperial population bounced back after the destruction of Terra, time was needed to make the most of the already inhabitable parts of the inner Sol system.

At it's inception the Empire had a population of a little over 3 billion and by the end had around 10 billion.

Luna
Luna saw the greatest growth in population through the Empire's 500 year history as it became the centre of the system after the destruction of Terra. Starting at aproximately 1 billion in 1 IY and growing to 5 billion by the end of the Low House Period.

About 5% of the surface of Luna is covered in spires and contains about half of the total population. In total around half of the surface was developed, limited by the massive amount of resources the population consumed.

Lagrange Stations
The Lagrange stations remained fairly stable in population as they were well established before the Empire was founded and remained untouched by subsiquent problems. Aproximately 50 million per station, total 200 million

Mercury
The Empire has an incarceration rate of around 1%, most of whom are on Mercury. Totaling at most 300 million prisoners.

Venus
Before the Nebulee Revolt Venus was home to relatively few people for its size as floating cities were still small and very little of the surface had been terraformed. 50 million total.

After Venus is recolonised the number of cities grew quickly, reaching stability at around 10 megacities averaging 50 million population each, and the same population again in smaller cities.

Mars
Mar's population grew slowly and steadily, starting at 2 billion and expanding to 4 billion by the end of the Empire. The rate of growth increased slightly once Venus and Luna reached capacity by 300 IY.

Belt
The belt is comparatively uninhabited, it's unlikely to have had more than 1 million inhabitants at a time.