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SHARE REPURCHASE PROGRAM (Tables) | 6 Months Ended
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Jun. 30, 2021
Share Repurchase Program |
Schedule of shares repurchased | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the Three Months Ended | ​ | For the Six Months Ended
​ | ​ | June 30, | ​ | June 30,
​ |  | 2021 |  | 2020 |  | 2021 |  | 2020
Shares repurchased |  | ​ | 743 | ​ | ​ | 185 |  | ​ | 2,218 | ​ | ​ | 1,669
Average price per share | ​ | $ | 537.25 | ​ | $ | 417.79 | ​ | $ | 479.69 | ​ | $ | 390.14
Total investment | ​ | $ | 399,634 | ​ | $ | 76,974 | ​ | $ | 1,064,167 | ​ | $ | 651,011

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