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EARNINGS PER SHARE | 3 Months Ended
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Dec. 31, 2022
EARNINGS PER SHARE |
EARNINGS PER SHARE | 5. EARNINGS PER SHARE ​ Basic earnings per share available to common shareholders is calculated by dividing net income available to common shareholders by the weighted average number of common shares outstanding for each period. Diluted earnings per share available to common shareholders is calculated by dividing net income available to common shareholders by the sum of the weighted average number of common shares outstanding and the weighted average dilutive equity awards. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the three months ended December
​ | ​ | 2022 | ​ | 2021
​ |  | Basic |  | Diluted |  | Basic |  | Diluted
Weighted average number of common shares outstanding | ​ | ​ | 581,612 | ​ | ​ | 581,612 | ​ | ​ | 563,546 | ​ | ​ | 563,546
Weighted average net additional shares outstanding assuming dilutive options exercised and proceeds used to purchase treasury stock (1) | ​ | ​ | — | ​ | ​ | 8,269 | ​ | ​ | — | ​ | ​ | 15,418
Weighted average number of shares outstanding | ​ | ​ | 581,612 | ​ | ​ | 589,881 | ​ | ​ | 563,546 | ​ | ​ | 578,964
Net income available to common shareholders | ​ | $ | 2,629,001 | ​ | $ | 2,629,001 | ​ | $ | 3,001,055 | ​ | $ | 3,001,055
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net earnings per share available to common shareholders | ​ | $ | 4.52 | ​ | $ | 4.46 | ​ | $ | 5.33 | ​ | $ | 5.18
(1) | Diluted earnings per share calculation includes all equity-based awards deemed to be dilutive.

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