272.26 (1990), 319.01 (1989), 297.85 (1988) *Central African Republic, Economy Exchange rates: Costa Rican colones (C) per US$1 - 12.1000 (June 1992), 12.0000 (1991), 9.7600 (1990), 9.7600 (January 1989), 9.7717 (1988), 10.3417 (1987); South Yemeni dinars (YD) per
underscoring