# File lib/Latin1Prober.rb, line 140
        def get_confidence()
            if get_state() == :NotMe
                return 0.01
            end

            total = @_mFreqCounter.reduce(:+, 0)
            if total < 0.01
                confidence = 0.0
            else
                confidence = (@_mFreqCounter[3] / total) - (@_mFreqCounter[1] * 20.0 / total)
            end
            if confidence < 0.0
                confidence = 0.0
            end
            # lower the confidence of latin1 so that other more accurate detector 
            # can take priority.
            confidence = confidence * 0.5
            return confidence
        end