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Income Taxes
9 Months Ended
Sep. 30, 2023
Income Taxes  
Income Taxes

Note 7.  Income Taxes

Our effective income tax rates for the third quarter and nine months ended September 30, 2023 were 23.7% and 24.2%, respectively, compared to 24.7% for the same 2022 periods. The differences between our effective income tax rates and the U.S. federal statutory rate of 21.0% were mainly due to state income taxes.