The reason for this is (assuming no malice from the index creators) Indians always have had low protein diet (I have evidence from all state cuisines which are

The reason for this is (assuming no malice from the index creators) Indians always have had low protein diet (I have evidence from all state cuisines which are very carb heavy for field work). Relatively lower meat consumption also skews it. However, eggs consumption has increased a lot in recent decades which should help.