Leaders' age 2

Long ago I wrote about the age of countries' leaders. I hoped to see a little increase in recent years but I only had data for 15 years and 4 countries. I found out the data myself which was a bit of a nightmare. Today, I want to show you a fascinating database: Archigos from Rochester University

"it contains information on the date and manner of entry and exit of over 3,000 leaders 1875 - 2004 as well as their gender, birth- and death-date, previous times in office and their post-exit fate"

and it is free! Is astonishing and it's in STATA format. So, I graphed again the evolution of world's leaders median age since 1875 till 2004 and the result is: