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Income Taxes
3 Months Ended
Mar. 31, 2023
Income Taxes  
Income Taxes

Note 7.  Income Taxes

Our effective income tax rates for the first quarters of 2023 and 2022 were 24.4% and 24.8%, respectively. 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 and higher foreign income tax rates, partially offset by the effects of company-owned life insurance policies.