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Earnings per Share (Tables) | 12 Months Ended
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Dec. 31, 2019
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Summary of Calculation of Basic and Dilued Earnings Per Share Amounts | Diluted earnings per share amounts are calculated by dividing consolidated net income for the year attributable to controlling interest by the weighted average number of shares outstanding during the period adjusted for the effects of dilutive potential shares (originated by the Company’s share-based payment program).
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | Per Series “B” Shares |  |  | Per Series “D” Shares |  |  | Per Series “B” Shares |  |  | Per Series “D” Shares |  |  | Per Series “B” Shares |  |  | Per Series “D” Shares |
(in millions of shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average number of shares for basic earnings per share |  |  | 9,244.16 |  |  |  | 8,635.65 |  |  |  | 9,243.81 |  |  |  | 8,634.26 |  |  |  | 9,243.14 |  |  |  | 8,631.57 |
Effect of dilution associated with non-vested shares for share based payment plans |  |  | 2.26 |  |  |  | 9.06 |  |  |  | 2.61 |  |  |  | 10.45 |  |  |  | 3.29 |  |  |  | 13.14 |
Weighted average number of shares adjusted for the effect of dilution (Shares outstanding) |  |  | 9,246.42 |  |  |  | 8,644.71 |  |  |  | 9,246.42 |  |  |  | 8,644.71 |  |  |  | 9,246.42 |  |  |  | 8,644.71 |
Dividend rights per series (see Note 23.1) |  |  | 100 | % |  |  | 125 | % |  |  | 100 | % |  |  | 125 | % |  |  | 100 | % |  |  | 125 | %
Weighted average number of shares further adjusted to reflect dividend rights |  |  | 9,246.42 |  |  |  | 10,805.89 |  |  |  | 9,246.42 |  |  |  | 10,805.89 |  |  |  | 9,246.42 |  |  |  | 10,805.89 |
Basic earnings per share from continuing operations |  |  | 1.03 |  |  |  | 1.29 |  |  |  | 1.13 |  |  |  | 1.41 |  |  |  | 2.04 |  |  |  | 2.55 |
Basic earnings per share from discontinued operations |  |  | — |  |  |  | — |  |  |  | 0.07 |  |  |  | 0.09 |  |  |  | 0.08 |  |  |  | 0.10 |
Diluted earnings per share from continuing operations |  |  | 1.03 |  |  |  | 1.29 |  |  |  | 1.13 |  |  |  | 1.41 |  |  |  | 2.04 |  |  |  | 2.55 |
Diluted earnings per share from discontinued operations |  |  | — |  |  |  | — |  |  |  | 0.07 |  |  |  | 0.09 |  |  |  | 0.08 |  |  |  | 0.10 |
Allocation of earnings, weighted |  |  | 46.11 | % |  |  | 53.89 | % |  |  | 46.11 | % |  |  | 53.89 | % |  |  | 46.11 | % |  |  | 53.89 | %
Net controlling interest income allocated from continuing operations |  | Ps. | 9,545 |  |  | Ps. | 11,154 |  |  | Ps. | 10,403 |  |  | Ps. | 12,157 |  |  | Ps. | 18,842 |  |  | Ps. | 22,021 |
Net controlling interest income allocated from discontinued operations |  | Ps. | — |  |  | Ps. | — |  |  | Ps. | 660 |  |  | Ps. | 770 |  |  | Ps. | 713 |  |  | Ps. | 832 |

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