18-02-2005 13:56									#1
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Demographics Formulas

Formulas
Update: Turn 4, 3800BC, Feb 18th, 2005

These are the formulas that make up the Demographics Stats in the F11 screen:

• Approval Rating (%)
  Rounddown (50% + ((Number of happy citizens) - (Number of unhappy citizens)) / (Total number of citizens) / 2 * 100%)
  
  
• Population (# of people)
  Sum(i=1..N) {Pop in City(i)}
  
  Pop in City = {Sum (j=1..(City Size)) {j} + (Food in Storage) / (Storage Size)} * 10000
  
  
• GNP (millions)
  1 million = 1 Commerce (before corruption)
  
  (Not fully understood yet) Slider setting & Trade Improvement dependant. If you have lots of Markets and banks but no Libs, then it will show more with slider set at tax than at beakers. This Value is equil to the From Citys Income part of the F1 screen.
  
  
• Mfg. Goods (megatons)
  1 megaton = 1 shield (after corruption)
  
  
• Land area (square miles)
  100 square miles = 1 territory tile (including sea tiles)
  
  
• Literacy (%)
  (Citizens who live in a city with a Library + Citizens who live in a city with a University + Citizens who live in a city with a Research Lab) / 3 / (Total Number of Citizens) * 100% + (3% if Literature discovered)
  
  The following wonders count as Library, University and Research Lab: Great Library, Newton's, SETI Program, Theory of Evolution, Cure for Cancer, Internet.
  
  The following small wonders count as half a wonder: Apollo Program, Intelligence Agency.
  
  
• Disease (%)
  (Number of Floodplains + Jungle in territory) / (Total Number of territory tiles) * 100%
  
  
• Pollution (tons)
  1 ton = 1 polluted territory tile
  
  
• Life Expectancy (# of years)
  20 + {(Citizens who live in a city with a Granary + Citizens who live in a city with a Aqueduct + Citizens who live in a city with a Hospital) / 3 / (Total Number of Citizens) * 80}
  
  
• Family Size (# of children)
  Max {1, (Net Total Food) / (Number of Cities) / 2}
  
  
• Military Service (# of years)
  (Number of Military Units with Attack > 0) / (Total Number of Citizens) * 10
  
  
• Annual income (# per capita)
  1 + (Number of available Strategic and Luxury Resource Types) + (1 if you have a trade route)
  
  
• Productivity (#)
  (Total Shields) - (Total Waste) + (Total Commerce) - (Total Corruption) + (Net Total Food)