(CNN) How's this for an adjective for the Donald Trump economy: average.

That word has scarcely been used to describe the president. But Friday's GDP revisions reveal a decidedly humdrum-looking economy.

The second quarter notched 2.1% growth, down a point from the first quarter. The economy stumbled at the end of the year and the president's much-ballyhooed second-quarter 2018 tally of 4.2% was revised to 3.5%.

But for the true picture, it's best to smooth it all out. Remember, the trend tells the story -- not a single data point. And that trend is a ten-year expansion averaging 2.3% annual growth. Quarterly revisions for last year deliver a picture that falls short of the president's promises of 3% economic growth and nowhere near his hyperbolic pledges for 3, 4, 5% growth.

The president and his team promised an economy supercharged by huge corporate tax cuts and historic rollbacks in regulation. Look at this bar chart.