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Consolidated Statements of Income (Loss) and Comprehensive Income (Loss) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues |  |  |
Net premiums earned (includes affiliated reinsurance of $203,409,131, $198,580,547 and $190,924,704 - see note 3) | $ 756,078,400 | $ 741,290,873 | $ 702,514,755
Investment income, net of investment expenses | 29,514,955 | 26,907,656 | 23,527,304
Installment payment fees | 4,134,749 | 5,256,721 | 5,157,163
Lease income | 443,750 | 480,617 | 500,455
Net investment gains (losses) | 21,984,617 | (4,801,509) | 5,705,255
Equity in earnings of Donegal Financial Services Corporation | 295,000 | 2,693,962 | 1,621,605
Total revenues | 812,451,471 | 771,828,320 | 739,026,537
Expenses |  |  |
Net losses and loss expenses (includes affiliated reinsurance of $103,218,679, $140,113,591 and $114,865,113 - see note 3) | 506,387,664 | 576,458,420 | 487,268,054
Amortization of deferred policy acquisition costs | 122,443,000 | 120,964,000 | 115,065,000
Other underwriting expenses | 114,561,741 | 113,270,131 | 116,538,431
Policyholder dividends | 8,978,406 | 5,353,023 | 5,014,624
Interest | 1,579,299 | 2,302,082 | 1,593,437
Other, net | 1,420,331 | 1,717,513 | 1,432,529
Total expenses | 755,370,441 | 820,065,169 | 726,912,075
Income (loss) before income tax expense (benefit) | 57,081,030 | (48,236,849) | 12,114,462
Income tax expense (benefit) | 9,929,286 | (15,476,509) | 4,998,362
Net income (loss) | 47,151,744 | (32,760,340) | 7,116,100
Statements of Comprehensive Income (Loss) |  |  |
Net income (loss) | 47,151,744 | (32,760,340) | 7,116,100
Unrealized gain (loss) on securities: |  |  |
Unrealized holding gain (loss) arising during the period, net of income tax expense (benefit) of $3,947,082, ($1,865,948) and $1,964,385 | 14,848,545 | (7,019,532) | 3,811,151
Reclassification adjustment for (gains) losses included in net income (loss), net of income tax expense (benefit) of $30,920, ($104,841) and $1,939,787 | (116,316) | 394,403 | (3,765,468)
Other comprehensive income (loss) | 14,732,229 | (6,625,129) | 45,683
Comprehensive income (loss) | $ 61,883,973 | $ (39,385,469) | $ 7,161,783
Class A Common Stock [Member] |  |  |
Basic earnings (loss) per common share: |  |  |
Common stock - Basic | $ 1.68 | $ (1.18) | $ 0.27
Diluted earnings (loss) per share: |  |  |
Common stock - Diluted | 1.67 | (1.18) | 0.26
Class B Common Stock [Member] |  |  |
Basic earnings (loss) per common share: |  |  |
Common stock - Basic | 1.51 | (1.09) | 0.22
Diluted earnings (loss) per share: |  |  |
Common stock - Diluted | $ 1.51 | $ (1.09) | $ 0.22

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