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5) Value of Business Acquired and Goodwill: Net amortization charged to income (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Details |  |  |  |  |  |  |
Value of business acquired - net amortization charged to income | $ 663,000 | $ 713,000 | $ 766,000 | $ 854,000 | $ 919,000 | $ 981,541 | $ 1,173,473

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