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>According to Statista the inflation rate has been equal or more than that with the exception of four years during that time frame.

The 57% growth is after inflation:

>>...median real income rose by 57% from 1990 to 2019.

('real' income means after inflation, 'nominal' income means before inflation.)

It's already adjusted for inflation, like most economic statistics posted by non-cranks. "Real" means inflation adjusted, "nominal" means not adjusted

An annual rise of 1.6% means income doubles ever 44 years.

Again: These number are already adjusted for inflation.