Simplify the following text for a Grade 8 native English-speaking person.
Original: The Comision de Hacienda issued 50 and 200 pesos in 1865 , whilst the Junta de Credito introduced notes for 10 and 20 centavos that year , followed by 5 and 40 centavos in 1866 and 1 , 2 , 5 and 10 pesos in 1867 .
Simplified: Coins were introduced in 1937 in denominations of 1 , 5 , 10 , 25 and 50 centavos . Since 1991 , coins of denominations 1 , 5 , 10 and 25 pesos have been introduced .