Probably hard to aggregate given that the data isn't available for every country and not continuous: https://data.worldbank.org/indicator/SI.POV.GINI?gt= https:

Probably hard to aggregate given that the data isn't available for every country and not continuous: https://data.worldbank.org/indicator/SI.POV.GINI?gt= https://data.worldbank.org/indicator/SI.POV.GINI?gt= But trend in the US and Germany has been steady growth. For those unaware: the Gini index ranges from 0 to 1 (or 0% to 100%) with 0 being total wealth equality and 1 being total inequality.