Federal Reserve data show that the average consumer checking account balance, a measure of consumer personal savings, has increased in 23 of the past 30 quarters.

Recent data from December 2017 through March 2018, illustrates an increase in the savings rate to 3.1% of disposable personal income as of March 2018. Economists view this increase as a possible pause in economic growth until consumers feel more confident about spending.

The Federal Reserve defines the personal savings rate as a percentage of disposable personal income (DPI), frequently referred to as “the personal saving rate,” and is calculated as the ratio of personal saving to DPI. Personal saving is equal to personal income less personal outlays and personal taxes.

Historically, Americans tend to save more as economic times become more difficult, and tend to spend during prosperous periods. Past slow downs such as in the mid 1970s and the early 1980s saw an increase in the savings rate, a barometer of consumer sentiment. The expansion during the mid-to-late 1990s saw a gradual drop in savings, as consumers spent more confidently as their incomes rose.

Sources: https://fred.stlouisfed.org/series/PSAVERT