Mexico's Cada Seis Aos. Mexico was famous-or infamous for many years for having two things every six years (cada seis aos in Spanish): a presidential election and a currency devaluation. This was the case in 1976, 1982, 1988, and 1994. In its last devaluation on December 20, 1994, the value of the Mexican peso (Ps) was officially changed from Ps 3.30/S to Ps 5.50/$. What was the percentage devaluation? KIED The percentage change in the peso versus the dollar was%. (Round to two decimal places)