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5. Cash and Cash Equivalents (Tables)
12 Months Ended
Dec. 31, 2018
Cash And Cash Equivalents  
Cash and Cash Equivalents
     
  12.31.2018 12.31.2017
Cash and bank accounts  167,728  157,470
Financial investments with immediate liquidity  1,780,681  882,605
   1,948,409  1,040,075