There is no particular significance to that number, it was chosen because I had seen similar metrics before but always for the whole country, or the entire worl

There is no particular significance to that number, it was chosen because I had seen similar metrics before but always for the whole country, or the entire world, and it usually was a measure of wealth not income. Example: https://www.cnbc.com/2017/11/14/richest-1-percent-now-own-half-the-worlds-wealth.html https://www.cnbc.com/2017/11/14/richest-1-percent-now-own-ha...