Games : How well should I be doing at any given moment in Civilization 3?

Generally in Civ 3, I feel like I'm doing well for most of antiquity, and then somewhere around late antiquity/early middle ages I realize I'm 4 or 5 techs behind almost everyone else (AI players), I have far fewer cities and every civilization is bullying me to give them free stuff. I think it would be helpful to have a model "timeline" describing how well you should be doing at any given moment. For example, "By 100 AD you should be making 20 gold per turn, you should be able to keep your science slider at 70%", etc.

I'm interested in the following information:

1. How many cities you should have.


2. How well-funded your science program should be, and how much technology you should already have researched.


3. How large your military should be.


4. How much money you should have, including per turn.


5. What your relationship with other (AI) players should be like.


6. How quickly you should be able to build units and city improvements, on average (I often find myself with many cities that take 50 or 60 turns to build a Musketman, and a handful that take 5 to 10 turns).

I realize that some of this may vary from game to game and strategy to strategy, but I just need a basic guideline to get me started. I just think learning would go more smoothly if I could constantly compare my progress to some sort of model, instead of suddenly finding out after several hours of play that I've been doing something wrong the whole time. I looked around Civfanatics and couldn't find anything like this, and I'm not sure what to put into Google.