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INCOME TAX EXPENSE
3 Months Ended
Dec. 31, 2021
INCOME TAX EXPENSE  
INCOME TAX EXPENSE

9.    INCOME TAX EXPENSE

The first quarter 2022 effective income tax rate was 22.3% compared to 22.5% in the first quarter of 2021. Income tax expense in the first quarter of 2022 was favorably impacted by excess tax benefit related to the vesting of share based compensation, decreasing the effective tax rate for the quarter by 1.7%.