In American history, the longest we ever went without setting a new record for revenues was 18 years, through the early part of the Great Depression. Since then, we've never gone more than six years without a new revenues record. Similarly, the longest we've gone without setting a new spending record is 23 years, basically from the end of WWI through the start of WWII. We had another longish run attributable to WWII demoblization, but since that was over, the longest we've gone without setting a new spending record was just four years (under Obama, as you might have guessed). Over any significant period of, say, a quarter century or more, revenues and incomes both tend to growth. And since 1960, the large majority of years have involved setting a new record for both revenues and spending. What matters for deficits, though, is which is growing faster. When we hamstring revenue growth with upper-class tax cuts, deficits tend to expand. When we don't they tend to contract.