Please re-read my comment. I'm not saying that GDP has actually been declining, I'm just saying that if we take nominal GDP and deflate using shadowstats' figures, the US economy would have been contracting. That's an absurd statement, which probably means the shadowstats' inflation figures are off.

Ah I see what your saying. I wasn't aware of shadowstats. Thanks for the clarification.

For others: http://www.shadowstats.com/alternate_data/inflation-charts

Shadowstats is a nonsense website you don't need to link to.

Is there something better that provides this type of alternate calculated information?

This isn’t adjusted by the 1980s measure of inflation, that measure is no longer used and is very flawed.