According to the book written by Angus Maddison, India's economy was grown during 1000 AD-1500 AD with a 20.9 percent GDP growth rate.
According to Angus Maddison's calculations, in 1000 AD, China and India together contributed 50.5% of world GDP. India had the largest economy till 1000 AD (with a GDP share of 28.9 percent in 1000 AD) and by 1600 AD, that share had gone up to 51.4%, with China accounting for 29% and India 22.4% of the world GDP. By 1820, however, India’s share had fallen to 16.1%. By 1870, it went down to 12.2% (Refer Page No:2 on India Budget -Figure 1: Global contribution to the world’s GDP by major economies from 1 AD to 2003 AD).