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Net Earnings Per Share
9 Months Ended
Sep. 30, 2019
Net Earnings Per Share  
Net Earnings Per Share

9.    Net Earnings Per Share

Basic net earnings per share is calculated by dividing net income attributable to common shareholders by the weighted-average number of shares of common stock outstanding during the applicable period. Diluted net income per share includes the potentially dilutive effect, if any, which would occur if our outstanding options to purchase our common stock were exercised. For all periods presented, dilutive net income per share is equivalent to basic net income per share.