Simplify the following text for a Grade 6 native English-speaking person.
Original: Only in 1947 were the first peso oro notes issued by the Central Bank in denominations of 1 , 5 , 10 , 20 , 50 , 100 , 500 and 1000 pesos oros .
Simplified: However , due to inflation , coins below 1 peso are now rarely found . Banknotes in use are 10 , 20 , 50 , 100 , 500 , 1000 and 2000 pesos .