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