WASHINGTON (AP) — U.S. consumers were slightly less confident in May for the second straight month, but they remain bullish by historical measures.

The Conference Board, a business research group, said Tuesday that its consumer confidence index fell to 117.9 from a revised 119.4 in April. The index hit 124.9 in March, its highest mark in 16 years.

The index that measures consumers' feelings about the current economic situation increased slightly, while the index measuring consumers' sentiment about the future was down more. Still, the expectations index is more than 30 percent higher than it was at this time one year ago.

Consumers' outlook for the job market was also mixed. The number of people surveyed who expected more jobs in the coming months declined, but so did the number of people expecting fewer jobs.

Economists closely monitor the mood of consumers because their spending makes up about 70 percent of U.S. economic activity.

Earlier Tuesday, the Commerce Department reported that consumer spending rose 0.4 percent in April, its best showing since December. Consumer spending grew at the slowest pace in seven years in the first quarter.

The Commerce Department reported earlier this month that retail sales were up April, but many retailers reported first-quarter earnings that showed challenges adjusting to the dramatic shift among shoppers to online spending.

Last week the Commerce Department reported that sales of new homes suffered the largest monthly decline in more than two years, but economists suggested it was an anomaly and expect a rebound next month.