The RBI has provided rates that banks used to give for one year deposits, all the way back to 1976. Here’s a plot of the “high” rates today (9.25 to 10%).
Much of the 90s was a 10 to 12% rate, and I remember that many bonds (IDBI etc.) offered 12%-14% to retail buyers. (We still own some 17 year bonds at 14% or so, which mature in 2016. )