Historic BoM data Eucla 1926 to 2008 17.4 - - - 17.45 16.3 17 16.9 17.5 16.65 17 17.35 17.6 17.25 17.2 17.1 - - - 17.05 - - - - - 16.8 - - - - - - - 16.5 - 17.55 - - - 17.55 - - - 17.75 - 17.25 17.95 17.8 17.1 - - 16.9 17.1 17.55 18.15 17.05 - 17.8 - 17.55 - 17.4 - - 17.5 17.95 - 17.45 18.25 17.3 17.9 17.9 17.9 17.65 17.7 17.35 17.9 17.6 17.85 18.35 17.65 18.35 17.9