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Condensed Consolidated Statements of Retained Earnings (Unaudited) - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Condensed Consolidated Statements of Retained Earnings (Unaudited)    
Retained earnings at beginning of period $ 31,196,823 $ 30,228,793
Net income 1,410,880 973,277
Cash dividends declared in the period, $.72 per share in 2018 and $.75 in 2017 (695,615) (724,599)
Retained earnings at end of period $ 31,912,088 $ 30,477,471