The overnight rate had already been slipping in the last few weeks.

By the summer of 2001, the overall rate had slipped to about 87 percent.

But immediately after September 11 of that year, the rate spiked a full 2 percent and hasn't slipped much since.

The prime rate at banks around the country slipped half a point to 8.5 percent, the lowest since 1987.

The rate of growth in personal consumption expenditures on things other than energy and food has slipped, but not by a lot.

But she did note that the closely watched Federal funds rate had slipped slightly in the last few days.

But from 1980 through 1989, the rate slipped to just 4 percent.

The average rate for public high schools in Philadelphia just slipped to 57 percent.

The rate then slipped to 9 1/8 percent as business slackened before the weekend.

The average rate for $50 million of 182-day paper slipped to 6.269 percent from 6.3434 percent.