Revenue at the nation's Indian casinos grew about 5 percent in 2007, significantly slower than in years past but still outpacing the growth rate at Nevada casinos amid a sluggish economy.

Figures from the National Indian Gaming Commission released today show that Indian casinos took in about $26 billion in gambling revenue in 2007, up from $24.9 billion in 2006.

Nevada casinos took in $12.85 billion in gambling revenue last year, up 1.8 percent from the year before.

The nearly 5 percent increase in 2007 marked the first time in more than a decade that tribal gambling did not enjoy double-digit growth from one year to the next.

The soft economy is one factor in the slower growth in 2007. Also, fewer big casinos came online than in years past, when huge casinos seemed to spring up overnight in California and elsewhere. Many of the tribes that have the ability to build casinos with Nevada-style games have already done so.

There are now 423 Indian gambling operations in the country, operated by 225 tribes in 28 states.