Sales tax revenue dipped 3.5 percent in Oklahoma City in the January reporting period, extending a persistent year-over-year slide in monthly collections.

Through the first seven months of fiscal 2017, sales tax revenue is off 4 percent.

Sales tax is the largest-single contributor to the general fund, the account for day-to-day expenses such as police and fire protection.

After projecting 1.6 percent sales tax growth to begin 2016-17, city budget officials now expect a decline of 2.7 percent for the year.