Note that bookmakers set their odds to minimise their own potential losses - if more bets are placed on a team, then they’ll reduce the odds. So this graph will be weighted towards the larger bets placed by supporters of the wealthier nations.

Still cool, tho.

Cool plot

The little space between each round is misleading because it shows a linear change within a match

Seeing Austria get bigger before the 1/8s just hurts :/