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Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2022
Stockholders' Equity Note [Abstract]  
Schedule of Dividends Paid Previously or Declared
The following table presents the cash dividends either paid previously or declared by our board of directors for future payment on a per share basis:
20222021
First quarter$0.31 $0.28 
Second quarter$0.31 $0.28 
Third quarter$0.31 $0.28 
Fourth quarter$0.31 $0.28 
Total$1.24 $1.12 
Stock Options Granted
The following tables summarize the details of options granted under our stock option plans that were outstanding as of September 30, 2022, and the assumptions used to value these grants. All such grants were effective at the close of business on the date of grant.
 Options
Granted
Option Exercise
(Strike) Price
Closing Stock Price on Date
of Grant
September 30, 2022
Date of GrantOptions
Outstanding
Options
Exercisable
January 3, 2022713,438 $62.00 $61.980 689,415 53,355 
January 4, 2021741,510 $48.00 $47.650 676,305 26,643 
January 2, 2020902,263 $38.00 $37.230 774,842 266,832 
January 2, 20191,316,924 $26.00 $25.705 942,372 411,536 
January 2, 20181,087,936 $27.50 $27.270 693,780 420,712 
January 3, 20171,529,578 $23.50 $23.475 675,420 516,344 
April 19, 20161,690,880 $23.00 $22.870 498,563 375,563 
April 21, 20151,786,440 $21.00 $20.630 363,211 286,051 
April 22, 20141,910,000 $28.00 $25.265 137,868 137,868 
Total11,678,969 5,451,776 2,494,904 
Fair Value Assumptions for Options Granted
Date of GrantRisk-free
Interest Rate
Expected Life of
Option in Years
Expected
Dividend
Yield
Expected
Stock
Volatility
Estimated Fair
Value of Stock
Option
January 3, 20221.3 %5.001.7 %28.52 %$13.68 
January 4, 20210.4 %5.002.0 %29.17 %$9.57 
January 2, 20201.7 %5.002.4 %25.70 %$6.81 
January 2, 20192.5 %5.002.9 %23.96 %$4.40 
January 2, 20182.2 %5.002.3 %23.45 %$5.02 
January 3, 20171.9 %5.002.6 %24.49 %$4.20 
April 19, 20161.3 %5.002.6 %26.34 %$4.09 
April 21, 20151.3 %5.002.7 %26.84 %$3.68 
April 22, 20141.8 %5.002.0 %28.55 %$4.79 
Reconciliation of Denominators used in Computation of Basic and Diluted Earnings Per Share
The following tables present a reconciliation of the denominators used in the computation of basic and diluted earnings per share and a summary of the options to purchase shares of common stock which were excluded from the diluted earnings per share calculation because they were anti-dilutive:
 Nine-month PeriodThree-month Period
Reconciliation2022202120222021
Basic weighted average shares outstanding574,667,188 574,637,254 573,019,381 574,973,196 
Weighted shares assumed upon exercise of stock options1,912,011 2,291,000 1,724,550 2,286,643 
Diluted weighted average shares outstanding576,579,199 576,928,254 574,743,931 577,259,839 
Anti-Dilutive Options Excluded
 Nine-month PeriodThree-month Period
Summary of Anti-dilutive Options Excluded2022202120222021
Options to purchase shares of common stock1,343,160 680,227 1,340,567 688,410 
Weighted average exercise prices of options$55.23 48.00 $55.22 48.00