Baton Rouge’s riverboat casinos brought in 4.3 percent less in August than they did the year before, as all three properties reported drops in revenue.

The riverboats’ combined winnings totaled more than $23.3 million in August, compared with $24.4 million in August 2014, according to figures released Thursday by Louisiana State Police.

The Belle of Baton Rouge, the oldest casino in the market, posted the largest drop in revenue, a 14.1 percent decrease from $5.4 million in August 2014. The downtown casino brought in nearly $4.7 million in August.

Hollywood Casino had a 4.8 percent drop. The casino won nearly $5.5 million in August, compared with nearly $5.8 million in August 2014.

L’Auberge, the newest casino in the market, posted the smallest decline in revenue. Winnings virtually were unchanged, dropping from $13.23 million in August 2014 to $13.21 million last month.

Statewide, the 15 riverboats, four racetrack slots casinos and Harrah’s land-based casino brought in nearly $214.1 million in August, 1.7 percent less than the $217.8 million the gambling halls won the year before.

The decline would have been steeper if not for the addition of the Golden Nugget Lake Charles. That riverboat casino, which opened in December, had $20.7 million in winnings during the month.

Winnings in the New Orleans casino market dropped by 8.5 percent in August when compared with the year before. The three riverboats, Harrah’s casino and slots at the Fair Grounds brought in $48.4 million. That compares with $52.9 million in winnings in August 2014.

Harrah’s continues to be hard hit by the city’s ban on smoking. The casino posted nearly $22.6 million in winnings, a 17 percent drop from the $27.2 million it won during August 2014.

Lake Charles, the state’s largest casino market, saw its winnings go up by 21.5 percent, thanks to the addition of Golden Nugget. The three riverboats and slots at the Delta Downs track bought in $75.0 million, compared with $61.7 million the year before.