You know what would be cool. Besides the history tab with all the graphs there should be an option to see how your colony has grown. It should show a slideshow (fade in and fade out -> transition) of how your colony has grown. Each slide is a screenshot of your colony within a given time interval. So when you play the slide show (you can pick which speed) it shows your colonies development through screenshots. Of course you can adjust when rimworld takes a screenshot of your colony.
This is done already by a mod. ts called progress render: https://steamcommunity.com/sharedfiles/filedetails/?id=1438693028