Aside from short-lived booms in the 1990s and 2000s, US productivity growth has averaged just 1.2% from 1975 up to today after peaking above 3% in 1972.
As we detailed previously, adjusting for the WWII anomaly (which tells us that GDP is not a good measure of a country’s prosperity) US productivity growth peaked in 1972 – incidentally the year after Nixon took the US off gold.