In 1929, Canada, United States and Argentina were neck-and-neck in term of their wealth. While East Asia is poor to very poor.
In 1950, Venezuela with its oil wealth has surpassed Argentina along with the US and Canada.
By 1973, Japan has started to grow and by the 1990s South Korea and Thailand has as well. However, Argentina lags behind along with many of the other South American countries so by 2008 it is North America and East Asia which have countries with the highest GDP per person.
Data from Maddison Project
Just a quick heads up. If you have ever wondered about my secret to making maps it is my brother, Matthew Mulbrandon, an urban geographer. Well, he now runs his own site at DesignandGeography.com where you can find more about his research on urban topics particularly housing and transportation. And of course more original maps about any topics that catch his fancy.
A simple map of Average Household Income by county
Made with Python, GEO Pandas -> formatted in Illustrator with MAPublisher plugin. Data from US Census Bureau, 2006–2010 American Community Survey.
Take a look at more data visualizations from my book, An Illustrated Guide to Income in the United States.