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OKLAHOMA CITY — Gross receipts to the state treasury fell to their lowest December total since 2010, state Treasurer Ken Miller said Thursday.

“After slowing a little last month, the downward trend of revenue collections accelerated in December,” Miller said in releasing the figures.

Gross receipts totaled $948.9 million in December. That is 9 percent, or $93.1 million, less than a year ago.

For the calendar year, gross receipts of $11.65 billion in 2015 were lower by 3 percent, or $361.8 million, than calendar year 2014.

Last year marked the first time since 2009 that gross receipts declined from the previous year.

Gross revenue is an indicator of economic activity and revenue trends for both state and local governments. That’s because it includes all taxes collected by the Oklahoma Tax Commission, including money returned to taxpayers as refunds and rebates, and sales and use taxes collected on behalf of local governments. The remainder — about 75 percent — is used for state government operations.