I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today.
The income that social security claims that you earned is just the income that was FICA taxed, and because each year there is a maximum amount of your income that can be taxed for Medicare and social security, if you were a high wage earner back in the 90's, then what appears on your income report with social security won't necessarily match your true income.
For example, in 1991, only $53,400 of your income would have been FICA taxed, even if you earned $100,000. In 2000, the amount subject to FICA tax was $76,200.
Here is a link to a chart of the income taxed by year for FICA: http://www.financialsamurai.com/maximum-taxable-income-amount-for-social-security-fica/
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I wish you and yours the best in 2016,