(Associated Press)  -  Gambling revenue at Massachusetts's increased slightly in October.

Plainridge Park Casino generated $12.9 million in gross gambling revenues in October, according to data released Monday by the state.

That's up slightly from September's $12.6 million haul, but because October has more days than September, the figures reflect a slight decline. Daily revenue per slot machine has steadily declined from $389 in July to $277 in October.

The racino has generated over $65 million since opening in late June and is on track to generate about $176 million in its first full year, or about $24 million less than the state's $200 million projection. Massachusetts collects 49 percent of Plainridge's gambling revenues.

Lance George, the casino's general manager, says it's normal for revenues to ``taper down'' after opening and that the casino's profits will eventually stabilize.