ouguiya (UM) = 5 khoums Exchange rates: Aruban florins (Af.) per US$1 - 0.6527 (January 1993), 2.5475 (1992), 2.7501 (1991), 1.7048 (1990), 2.7088 (1989), 2.6188 (1988) Fiscal year: 1 July - 7 AM, 8 FM, 4 TV; 1 Indian Ocean shipping