Historic GDP PPP per capita by country and region (in 1990 international dollars)

The Maddison project is an international group of scholars who continue and build upon Maddison's work. In their 2014 report they concentrate on the pre-1820 period. Their revised figures show pre-industrial Europe to be richer, but its economic growth to be slower than previously thought.[2] Their findings confirm Maddison's view that the income gap to Asia was already large before the Industrial Revolution.[3] The entirety of their GDP per capita estimates can be obtained from their online database.[4] The following data selection they present in their published paper:[5]

Reference 1: England, Holland, Northern Italy, Spain, Western Europe, United States, Cape Colony, Anatolia, Egypt, Iraq, Japan and India.

Reference 2: 1, 730, 1000, 1150, 1280, 1300, 1348, 1400, 1500, 1600, 1700 and 1800.

Source: http://en.wikipedia.org/wiki/List_of_regions_by_past_GDP_(PPP)_per_capita