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Note 16 - Income Tax - Reconciliation of Effective Tax Rate (Details) - ARS ($) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Reconciliaction of Effective Tax Rate Abstract |  |  |  |  |
PROFIT BEFORE INCOME TAX | $ 2,766,667,000 | $ 2,582,003,000 |  |  |
Applicable Tax Rate | 30.00% | 35.00% |  |  |
Subtotal Income Tax | $ (830,000,000) | $ (903,701,000) |  |  |
Permanent Differences Abstract |  |  |  |  |
Tax Exempt Income | 196,353,000 | 258,649,000 |  |  |
Non Deductible Expense | (69,985,000) | (35,907,000) |  |  |
Change in Tax Rate | 288,426,000 | 882,320,000 |  |  |
Other Tax Differences | 17,623,000 | 27,438,000 |  |  |
Net Monetary Inflation Adjustment | (5,352,855,000) | (3,009,650,000) |  |  |
Subtotal Income Tax Expense | (5,750,438,000) | (2,780,851,000) |  |  |
Inflation Adjustment in Income Tax Expense | 1,414,068,000 | 2,058,359,000 |  |  |
Income Tax Expense | $ (4,336,370,000) | $ (722,492,000) | $ (555,002,000) | $ (647,945,000) | $ (264,257,000)
Effective Income Tax Rate | 157.00% | 28.00% |  |  |

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