CAGR stands for compounded annual growth rate. It is the measure of change over a period of time, effectively compounding the base value every year, at that rate. Simply put, it means the compound rate at which the amount has grown during the period under consideration.

The CAGR for the above 5 year period from 1^st Jan 2000 to 1^st Jan 2005 will be

= (400 / 100) ^ (1/5) -1

= 32.0%

This means, Rs. 100 has given a return of 32% compounded every year.