ssdi benifit amount

What is the name of your state?What is the name of your state? MI
I have 2 from the LISTING OF IMPAIRMENTS.
Central nervous system vascular accident. from 3/96 and Parkinsonian syndrome from 7/99. Situation is I haven't worked since 3/96 and just now applied for ssdi. how can I be sure my benifit amount is based on income averaged before 1996 not averaged thru 2005?

Right I qualify with 4 credits x 19yrs = 76 credits. Will SSDI have a term or calculation for adjusting PIA or AMIE to include only pre 3/96 years and wages?

it is your average earnings over your working years that determine how much your monthly payment will be.

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That is from the site I posted .
I can't tell you for sure how they calculate it , but as it states , the average from ALL that you earned .

Also be aware in some states you might be eligible for supplemental Security in addition .

I think I found an anserw at
link
Using a different example it says ,

-First determine the onset date for the disability.
-Then determine insured status.
-Then count the number of years someone has worked as a "covered individual" beginning with age 22 (8 years in our example).
-For this disability benefit calculation, drop out 1/5 of the 8 years including dropping out any fraction remaining (1 year, in our example).
-This leaves a total of 7 computation years.
-Next index all available earnings to two years before the year the worker becomes disabled.
-Of these indexed earnings, pick the highest 7 years; add the earnings and then divide by the number of months in 7 years (84 months).
-Finally, apply the progressive benefit formula to the resulting Average Income Monthly Earnings (AIME).
-This gives you the person's monthly disability benefit

key being calculations from onset date, right ??