OK, that raises more questions. Let me do the math using your sources,
From the above source,
Poverty level in 1951 = 45 per 100
Poverty level in 2011 = 22 per 100
Reduction in poverty from 1951 - 2011 = 45-22 = 23 per 100
Percentage change from 1951 - 2011 = (23/45) * 100 = 51.11%
Now lets try to figure out 2011 - 2016,
Poverty level in 2011 = 22 per 100
Poverty level in 2016 = 11 per 100
Reduction in poverty from 2011 - 2016 = 22-11 = 11 per 100
That is, in 5 years from 2011 to 2016, reduction was 11. So per year reduction = 11/5 = 2.2 per 100
Using this lets calculate the reduction from 2011 - 2014 = 3 * 2.2 =6.6 per 100
Now subtract it from 2011 levels to find the poverty level at 2014 = 22 - 6.6 = 15.4 per 100.
Now lets calculate the difference from 1951 to 2014 = 45 - 15.4 = 29.6 per 100
Percentage change from 1951 to 2014 = (29.6/ 45 ) * 100 = 65.77% ( no where near your 90% initial claim or your revised 83% claim)
2014 - 2016 reduction needs to be attributed to that period's government. Hence I took out the 2014-2016 reduction. Note that I still haven't taken out the duration of Vajpayee government here (6 years). Now, lets say for arguments sake I am not taking out anything, we calculate the difference from 1951 - 2016.
Reduction in poverty from 1951 - 2016 = ((45 - 11)/45) * 100 = 75.56%, still no where near your initial 90% claim or your revised 83% claim. Note that I haven't taken out the 6 year term of Vajpayee government. If you want, I can give you that also. That would mean the poverty reduction under your favorite family will go further down.
Per year reduction in poverty from 1951 - 2016 = 75.56/(2016 - 1951) = 1.162%
Now lets calculate the change from 2014 to 2021,
Poverty level at 2014 = 15.4 per 100
Poverty level at 2021 = 11 per 100
Difference 15.4 -11 = 4.4 per 100
Percentage reduction = (4.4/15.4)*100 = 28%
Per year reduction from 2016 - 2021 = 28/(2016-2021) = 5.6%
Summary,
Reduction in poverty from 1951 - 2011 = (23/45) * 100 =
51.11%
Reduction in poverty from 1951 to 2014 = (29.6/ 45 ) * 100 =
65.77%
Reduction in poverty from 1951 - 2016 = ((45 - 11)/45) * 100 =
75.56%, you first claimed 90%, then 83%.
Reduction in poverty from 2016 - 2021 = ((15.4 - 11)/15.4)*100 =
28.57%
Per year reduction in poverty from 1951 - 2016 = 75.56/(2016 - 1951) =
1.162% reduction per year
Per year reduction from 2016 - 2021 = 28/(2016-2021) =
5.6% reduction per year
I see that you have conveniently ignored the level in 1951, and chose a high base in 55/66, there by skirting the rise in poverty level from 51 to 55/66. Smart move buddy! Yet you couldn't reach your 90% initial claim.
Now, all my numbers are quoted from your sources. Now show me how you got your 83% or 90%.