Comparison of Argentina, Chile, Venezuela and Spain for the 1820 to 2008 period in absolute terms:
- Argentina was the wealthiest of the four countries from 1820 to 1940 (although Chile and Spain equalized Argentina around 1870) to be surpassed by Venezuela in the early 1950's
- Chile suffered an almost 40% drop in GDP per capita as a result of the great depression or more specifically low copper prices as a result of it
- Venezuela didn't have any real per capita growth for the last 60 years (!)
- Spain overtook its former colonies of Chile, Argentina and Venezuela in 1965, 1975 and 1983 respectively, the current crisis in Spain is not yet reflected in the data but the difference seems to be too big to be bridged even by Chile in the near term
Finally the rank in terms of GDP per capita among the Spanish speaking countries / territories. The country which was top ranked in the 19th century was Uruguay. Currently the bottom country is Nicaragua.
Data is here.