For the Three Months Ended

For the Six Months Ended

June 30,

2022

2021

2022

2021

Numerator (basic and diluted):

Net income

$

576,760

$

585,451

$

1,058,640

$

1,087,060

Denominator:

Weighted-average common shares outstanding – basic

65,116

69,618

65,840

69,997

Effect of stock options ⁽¹⁾

570

646

594

643

Weighted-average common shares outstanding – assuming dilution

65,686

70,264

66,434

70,640

Earnings per share:

Earnings per share-basic

$

8.86

$

8.41

$

16.08

$

15.53

Earnings per share-assuming dilution

$

8.78

$

8.33

$

15.94

$

15.39

Antidilutive potential common shares not included in the calculation of diluted earnings per share:

Stock options ⁽¹⁾

135

122

133

187

Weighted-average exercise price per share of antidilutive stock options ⁽¹⁾

$

656.05

$

463.76

$

656.62

$

449.20