World GDP comparison from 1st Century till date

I was doing some research on GDP and came across this posting in Wikipedia. This is pretty interesting read. Am not sure how true the information is however it looks like India and China have been the world leaders for over 2 milleniums. There was a blip from mid 1800's to 2000 where both these countries lagged behind the western world however we are catching up and should be back on the top by 2050.

Click on the post heading to see the link.