Oddbean new post about login | logout @7750d787 @19cbfccb What did you use to make the chart?
@1a4328b2 @19cbfccb Excel, and the data sources I listed in the subtitle. I interpolated through the gaps in data, and cut it off at 1900. Oh I also used population data from the Penn Libraries statistics to calculate the rates for the older data. It's not that great, but I originally made it just for myself...