At the time of each dividend or apportionment of profits and at least once in every year, the directors shall cause to be prepared a statement showing the financial condition of the corporation at the end of the period to which such dividend or apportionment relates, in such form as shall fully exhibit the assets and liabilities of the corporation; its earnings and profits, purchases and sales, expenses and outlays, for the period covered by such dividend or apportionment, in such manner that a good understanding of the condition of the company, may be obtained from such statement, and shall cause such statement to be kept on file with the secretary where the same may be examined by any member of the corporation at all reasonable times.